Qgis Group By Attribute

clean - alternative for sliver removal - Part VII - Duration: 4:03. 0 QGIS Overview 4. If you are a country user group, please try to hold a funding drive within your user group and pass the funds either to the upstream QGIS. As long as the layers have the same geometry, we can merge them. 0 is a huge overhaul and cleanup of our beloved Open Source GIS. But in following video you will not only see the described steps above but also how to transform string values to keyfigures / real numbers:. , symbolization, labeling), open the attribute tables, and so on. Posted on May 16, 2015. To enable the QGIS labs, check the box for "NISGTC QGIS" in the class settings. Points that have the same value for the group by field will have their own counts and summary field statistics. QGIS includes some basic editing functions that allows you to create and edit several kinds of feature geometry data including points, lines, polygons, text , and tables. Select an attribute, click 'Add', and repeat this for the other attributes. Now, the attributes can be added one at a time. Ungroup the layers by selecting each layer within the group and dragging it outside of the group in the Layers window. From this menu, you can. In 2010 the IUCN released a part of the distribution data. I was thinking. For example, if you are summarizing crimes within neighborhood boundaries, you may have an attribute Crime_type with five different crime types. Likewise, the railroads could have an attribute for average speed, but this attribute wouldn't make sense in either the states or the cities layers. Semi-Automatic Classification Plugin for QGIS has 8,577 members. e the Shapefile which can be merged with each other should have an identical shape, i. Runs through each geometry that you want to select from and tests if the centroid or the point of surface central point falls within the selecting geometry. I've been using an aggregate function with a concatenate attribute (because I need access to the layer attribute that the normal concatenate function doesn't have) to build test sheets with an Atlas. Select By Attributes allows you to provide a SQL query expression that is used to select features that match the selection criteria. Vector - Data Management Tools - Split Vector Layer. You really have to know what's so special about Geopackage (. We will use Birdlife’s data records to plot the location of the most recent sitings (1980 to 2005?) of the Philippine Eagle (Pithecophaga jefferyi). Joining Two Existing Tables (Video: Join Tables) Start QGIS, and add the theme. QGIS has sophisticated tools for interacting with your data by identifying features, selecting data based on queries, variables, and obtaining high-level statistical summaries. Features at a Glance¶. Entering attributes after creating a new feature. Differences with the API. QGIS: Getting Started October 16, 2015 November 16, 2015 Elvira In this tutorial, we will learn some basics of using QGIS, including getting familiar with the QGIS interface, adding vector layers and manipulating attributes. Is licensed under the GNU GPL v2, and supported by QGIS 2. This must be done for each class requiring access to the labs. Field display options in the Select By Attributes dialog box. Even if the WFS service URL is the same as a. Recently, we’ve been working on an exciting development which is coming soon in QGIS 3. But hey, after all we are a bit lazy and on the one hand like to have an ice cream later on that afternoon and on the other hand like to avoid errors. Edit or merge several features at once / advanced digitizing Sometimes you find new QGIS functionality when a user asks you a question. 12: A new "random marker fill" symbol layer type, which fills polygons by placing point markers in random locations; You can read more about our SLYR ESRI to QGIS compatibility tool here, or email [email protected] Hi r/QGIS-So I'm doing some amateur redistricting, and the best workflow I've found to date is with QGIS - I can select all the {local equivalent of a US census block group}s in a potential district, and figure out how many people are in that potential district. So you could load vector data from anywhere, and save it back to anywhere, and do the same operations on everything, with limitations being applied at save time, not at run time. Easy enough to go to QGIS and select those features by type one after the other and use a bit of copy-paste. There are multiple ways to solve the problem in QGIS, so I thought I'd have a look at how they perform. The greatest QGIS release ever! QGIS 3. The widget sports a flexible configuration, including example templates and expression support. Performing Table Joins (QGIS3)¶ Not every dataset you want to use comes in spatial format. You can check this setting via the menu Project>Project Properties and the General side tab). QGIS - Fill gaps and slivers between polygons - v. That will add a xcoord and ycoord to your data. 0 brings a massive list of new changes - the highlights of which we will try to cover here. Data, and QGIS (2017) c) Check the Data Quality Information section for an update history. For a (similar but outdated) German version take a look at de:Wikipedia:Redaktion Biologie/Verbreitungskarten/How-to QGIS. The Join Attributes by Location box opens, select:-Select the Target vector Layer (the layer to update) Select Join Vector Layer (the layer that will provide the new data) Attribute Summary. Usually, the attribute with the highest maximum value at the regional level will be used to determine the maximum bar height. The output layer type is Line, not PolyLine. Ask a developer to make the changes for you. # Lizmap Web Client Possibility to group many QGIS layers as one Geometry and attributes can be edited at. Joining polygon attributes to points is a pretty common geoprocessing step. We will be using the same plots from QGIS: Distance Calculations II. Select an attribute, click 'Add', and repeat this for the other attributes. To add another filter, repeat these steps. The tree knows about all of the data in the input. You can turn on a setting on the Attributes tab of the Editing Options dialog box so you will be prompted to enter attributes into the Attributes dialog box after any editing operation that results in new features, in either all layers or specific ones in your map. Prior construction of the hull the data may optionally clustered using a Shared Nearest Neighbor Clustering algorithm after Ertoz, Steinbach & Kumar (2003). The QGIS Processing Toolbox¶. The Extract Data tool is a convenient way to package the layers in your map into datasets that can be used in ArcGIS Pro, Microsoft Excel, and other products. Bhaskar Reddy Pulsani. For non-essential attributes, the column can be left blank provided that the column headers for the required attributes are added. I would like to group them by species name and using numbers from 1 to n as seen on picture and if possible, not by hand because sometimes I have hundreds of species. Each unique crime type forms a group, and the statistics you choose will be calculated for each unique value of Crime_type. Jerry Clough presentation on OSM and QGIS, at the South East QGIS user group meeting, 2nd April 2014 Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Do you have any suggestions?. I want to group and count features with the same code attribute value. Let's see how the same query can select features using EXPRESSION. Note that the plugin is still marked "experimental" so you have to allow experimental plugins in order to install it. Stories may not be edited without permission from Ensia. Here is a graph showing how often people entered the search term " QGIS " into Google over the last 10 years. None [32] Value Tool. We can tell the GIS Application to give each unique string or number its own colour and symbol. Splits an input dataset by unique attributes. Attribute values from the input feature classes will be copied to the output feature class. Often, we want to label only a few features in a layer. Right click and "Save as". Merging can be based on one of these two criteria: Length: a segment is merged to its longest neighbor. This is done using the QGIS 'Select features using an expression' button: We are looking to select only features which have a value for the height attribute we wish to use in the 3D visualisation. Perspectives A new DXF standard interface was implemented with QGIS version 2. Third, we might want to change the attributes of all features within a layer. In the past QGIS projects could only be saved to the file system, which is hard to share if you are trying to allow multiple users to share projects who are not on the same network. In QGIS we can perform this task using Join Attribute by Location tool. Often the data would come as a table or a spreadsheet and you would need to link it with your existing spatial data for use in your analysis. qgs and add all the data except the results layer from your HW2 geodatabase. איחוד נתונים טבלאיים ב-qgis על פי מיקום. There exists the possibility to select those raster cells that comply with a certain criteria based in the values adopted by each of them. For this the labelling must be activated with the certain attribute. QgsLayerTreeGroup taken from open source projects. There is Join attributes by location in the Vector menu and Add polygon attributes to points in the Processing toolbox. Even if the WFS service URL is the same as a. The SSURGO database contains information about soil as collected by the National Cooperative Soil Survey over the course of a century. 2 Data validation for template shapefiles for data validation rules (i. After a first and simple sample session in Section Getting Started we now want to give you a more detailed overview of the features of QGIS. I faced the same issue and I developed a QGIS plugin to solve it. This is where raster and vector layers are displayed when added to the map Multiple Instances of QgisApp Multiple instances of Quantum GIS application object detected. You will notice that a subset of points is now rendered in yellow. Spatial Join in QGIS – Quantum GIS an open source software. Runs through each geometry that you want to select from and tests if the centroid or the point of surface central point falls within the selecting geometry. qgz file using Project -> Save or Project -> Save As…. 0 is a huge overhaul and cleanup of our beloved Open Source GIS. Public group. 14 'Essen' If you are upgrading from QGIS 2. The second way to derive X and Y is to use the Field Calculator. 2) Update all to Grass 7 3) Attribute editing can be done in QGIS 4) Create forms for attribute capture in the plugin. Saving projects to PostgreSQL. It has both viewing and some rudimentary editing and attribute querying capabilities. I was thinking. A more intuitive way to open the group/tab properties in drag and drop form designer Ability to save/load Composer Attribute. I faced the same issue and I developed a QGIS plugin to solve it. Works in two ways. Visualization of data provides new knowledge. We can tell the GIS Application to give each unique string or number its own colour and symbol. Right-click on the layer and select Open Attribute Table. However using the concatenate parameter of the doesn't allow use of a group_by function and the list i generate appears in a random order. Joining Census Data Tables to Shapefiles in ArcMap. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] 0 and above. Difficulty: Moderate Requirements: ArcGIS 10 or higher This tutorial will demonstrate how to format census data tables from the U. This is where raster and vector layers are displayed when added to the map Multiple Instances of QgisApp Multiple instances of Quantum GIS application object detected. However using the concatenate parameter of the doesn't allow use of a group_by function and the list i generate appears in a random order. QGIS defaults to saving ‘relative pathnames’ which means that as long as you save all of your project files in the same folder or its subfolders, you can move it to a different location, such as a USB stick. This exercise will guide you through creating a vector layer from a text file of point locations. I would like to use data from my own country, Norway. QGIS SLYR ESRI to QGIS compatibility suite - October 2019 update Posted on October 9, 2019October 9, 2019 northroadwpadmin Recently, staff at North Road have been hard at work on our SLYR "ESRI to QGIS compatiblity suite", and we thought it's time to share some of the latest exciting updates. An introduction to QGIS from Neil Benny of thinkWhere including a short history of the development of the software. js in my new blog series from Foldøy island. QGIS 3 Categorize, and Attribute form Lene Fischer. An alternative format that can also be used is the xBase format, which has an open specification, and is used in open source shapefile libraries, such as the Shapefile C library. Output options: A shapefile or KML file with vector features. Some of them are in fact calling external applications, such as SAGA or GRASS GIS, which is why the algorithms are organised by provider. You can control which boundaries are merged by specifying a field. This was increased to 1,048,576 rows with Office 2007. This sounds like an R or SQL problem and QGIS is the wrong tool. The greatest QGIS release ever! QGIS 3. In this tutorial, we will learn how to create attributes (e. QGIS provides a rich set of tools for viewing and displaying attribute data. Once it has been added go to the processing tools and search for the added geometry values tools. Adding ESRI's Online World Imagery Dataset to QGIS. This is the 3 letter code for the country that a particular feature falls in. Working with the Attribute Table¶ The attribute table displays information on features of a selected layer. To add another filter, repeat these steps. QGIS can be used to export data to a mapfile and to publish them on the Internet using a webserver with UMN MapServer installed. A very handy plugin for QGIS I use day to day is go2streetview by Enrico Ferreguti. Attribute Queries. For this tutorial, I will edit the borders of a country using the free and open source GIS editor QGIS. Third, we might want to change the attributes of all features within a layer. The Split By Attribute Tool is a customization of ArcMap 10. Create interactive maps and apps and share them with the rest of your organization. Select the folder where the two (or more) shapefiles you want to merge are located using the Browse button. Organize your map through a Group. 0 brings a massive list of new changes - the highlights of which we will try to cover here. None [32] Value Tool. I want to group and count features with the same code attribute value. Adding ESRI's Online World Imagery Dataset to QGIS. Joining polygon attributes to points is a pretty common geoprocessing step. 5: Link to the user manual not working when running Danish version of QGIS - might be the same for other languages where the user manual is not translated? QGIS Translation Team 2019-03-13 12:44 PM. The Mapping Platform for Your Organization. QGIS plugins are written in Python, and you will learn how to do so later on in this lesson. Spatial Join in QGIS – Quantum GIS an open source software. osm file can be opened as a vector file •Downloaded data are saved to 3(-5) layers, with the following attribute fields: •Common OSM attributes: osm_id, name,… •Most frequent tag values are saved to separate. I am using QT Creator to write a plugin for QGIS Desktop 2. I want to attach the data from the polygon to the point data underneath them. QGIS-ConcaveHull-Plugin. A new type of vector layer form widget for showing graphically appealing and interactive items like charts or technical drawings on the attribute form has been added in QGIS 3. We offer 2 levels of training, 'QGIS Essentials' and 'QGIS Pursuit' QGIS Essentials Course. QGIS: Getting Started October 16, 2015 November 16, 2015 Elvira In this tutorial, we will learn some basics of using QGIS, including getting familiar with the QGIS interface, adding vector layers and manipulating attributes. Selecting features in attribute table using maximum aggregate function. The Input Table can be a feature class or table. Realize new opportunities and gain insight. In this tutorial, we will learn how to explore some in-built geometry functions in QGIS and how to calculate basic statistics. One method to select features in a layer is to select features using an attribute query:-To query a layer by its attribute data, Right click on the layer's name in the Layer Panel; Select Query from the short cut menu to open the Query Builder box. QgsLayerTreeGroup taken from open source projects. Now click the big comma on the left to load a csv in QGIS. I faced the same issue and I developed a QGIS plugin to solve it. You can subscribe to the list, or change your existing subscription, in the sections below. (Nederlands) QGIS op de FOSS4GNL 2019 (20 juni in Delft) user group. 12 The Module 'Filter' Topic searching for Modules by simply typing: 'hy' (hydrology tools). QGIS provides two view modes to easily manipulate data in the attribute table: The Table view, displays values of multiple features in a tabular mode, each row representing a feature and each column a field. We all know that QGIS is great for designing maps but did you know that QGIS is also great for interactive web maps? It is! Just check out qgis2leaf and qgis2threejs. When the Administrative Units group has no layers left, you can right click the group name and select Remove. I am trying to create a heatmap in QGIS, and most guides suggests using the heatmap plugin. The plugin even allows you to use a variety of interesting basemaps including Stamen Watercolor (see our post on the watercolor map). In contrast to the standard import, however, the texts (labels) with all attributes (especially text angles) are taken over cleanly. No matter if the tables have different attributes/columns, we still be able to merge them. Changelog for QGIS 2. Scroll all the way to the right and you will see the new column. You can subscribe to the list, or change your existing subscription, in the sections below. Its advantages: it is a strong tool for geospatial analysis; it's easy to export your work to static images (PDF, TIFF, etc. Adding ESRI's Online World Imagery Dataset to QGIS. Strings attributes are often used to classify things by name. One method to select features in a layer is to select features using an attribute query:-To query a layer by its attribute data, Right click on the layer's name in the Layer Panel; Select Query from the short cut menu to open the Query Builder box. There is Join attributes by location in the Vector menu and Add polygon attributes to points in the Processing toolbox. Here are the examples of the python api qgis. The additional attributes and their values are taken from a second vector layer, where features are joined by finding the closest features from each layer. Adding ESRI's Online World Imagery Dataset to QGIS. You can also make use of QGIS finer grained querying power, using the EXPRESSION tool user interface, or by running your own custom Python scripts with the same operators and functions. Complete all the attribute details you can for the feature (check the legend to see which fields are mandatory): Refer to 4. Even if the WFS service URL is the same as a. QGIS will save the file and ask if you want to load it into the project. Splits an input dataset by unique attributes. How To: Select multiple values using the Select By Attributes tool Summary. The matching rows will be selected, and the total number of matching rows will appear in the title bar of the attribute table, as well as in the status bar of the main window. This is not always correct. Note that the plugin is still marked “experimental” so you have to allow experimental plugins in order to install it. QGIS defaults to saving ‘relative pathnames’ which means that as long as you save all of your project files in the same folder or its subfolders, you can move it to a different location, such as a USB stick. All content is licensed under Creative Commons Attribution-ShareAlike 3. This dataset needs some improvements, and this blog post will show you how to do merge polygons in QGIS. The SSURGO database contains information about soil as collected by the National Cooperative Soil Survey over the course of a century. However, if the input is a layer or layers created by the Make Feature Layer tool and a field's Use Ratio Policy is checked, then a ratio of the input attribute. Search Query Builder and Query Builder both enable increasingly sophisticated searches with the ability to. QGIS provides a rich set of tools for viewing and displaying attribute data. Once it has been added go to the processing tools and search for the added geometry values tools. Essen was the host city to our developer meet ups in October 2012 and 2014. lines that share an endpoint) into a smaller set of longer lines. Create a new map in QGIS called HW2. To move filters up or down, point to a filter in the list and click the arrow buttons. Quantum GIS is an opensource desktop GIS tool that supports ESRI Shape, MapInfo Tab/MIF, PostGIS and various raster formats such as GeoTiff, ErDas Imagine, Jpeg 2000, ERMapper (ECW), and ESRI ArcInfo ASCII Grid. You will need to know how to export SHP files from Houdini and how to calculate the distances between plots and roads…. ORG project or support developers who are in your country to do bug fixing and implementation work for QGIS 3. Standard toolbar QGIS Overview Intro to Foss GIS v1. As this doesn’t suit well. None [32] Value Tool. Add a new field in Attribute Table 5. QGis, a GIS software which is easy to use has 294 members. Likewise, the railroads could have an attribute for average speed, but this attribute wouldn't make sense in either the states or the cities layers. 0 and above. Imagine that the features in one of the layers, the input polygons layer, are all colored red. Combining QGIS and Excel Pivot table to preform grouping statistics. Hans van der Kwast 5,069 views. 12 releases as this QGIS 2. So that in the attribute table there is just one feature. Public group. Hierarchical clustering is native and requires no additional libraries, K-Means requires SciPy. QGIS is an open-access. This is performed using the Select By Attributes tool, which is described here. Vector - Data Management Tools - Split Vector Layer. I have an interesting problem in QGIS, I have a vector layer of points (shown in purple) and a layer of polygons (green) with a number of metadata attributes attached (i. 21 version – as that is the version of my QGIS Server and that my Lizmap Web Client is using. 2 a new "Import geotagged photos" algorithm has been added to Processing. This is the 3 letter code for the country that a particular feature falls in. Easy enough to go to QGIS and select those features by type one after the other and use a bit of copy-paste. Organize your map through a Group. or with QGIS' OSM downloader plugin •download area has to be defined (boundaries of a rectangle) •downloaded. e either "Point", "Line" or "Polygon"?. You can create groups by specifying a group field from the input points. Quantum GIS Ctrl+P New Print Composer Ctrl+ط Zoom to Selection إرتفعْ إلى الإختيارِ Labeling Manage Plugins. Description of SSURGO Database. With options to add differential GPS equipment to your mobile GIS kit and the capacity to take your basemaps and other data with you into the field, mobile-GIS eliminates the disconnect between data capture and GIS. =20=20 Also, you can't add a new attribute or delete an existing one - the buttons don't work. js map using QGIS with no HTML/JavaScript/CSS programming. Then when you get a new dataset and want to apply the same logic - same procedure. I have both QGIS Desktop LTR 2. All content is licensed under Creative Commons Attribution-ShareAlike 3. We all know that QGIS is great for designing maps but did you know that QGIS is also great for interactive web maps? It is! Just check out qgis2leaf and qgis2threejs. For this tutorial, I will edit the borders of a country using the free and open source GIS editor QGIS. One user wanted to show her photos in QGIS as she is it used from Google Maps: See a point, click on it and see the great image you've taken on your journey. It will create a new layer called Added Geometry Info. Converting Text Files to Shapefile Layer¶. Select the Identify tool and click on that polygon. In contrast to the standard import, however, the texts (labels) with all attributes (especially text angles) are taken over cleanly. For this tutorial, I assume you already have QGIS Desktop installed. And the Form view shows feature identifiers in a first panel and displays only the attributes of the clicked identifier in the second one. Note that the plugin is still marked “experimental” so you have to allow experimental plugins in order to install it. QGIS defaults to saving 'relative pathnames' which means that as long as you save all of your project files in the same folder or its subfolders, you can move it to a different location, such as a USB stick. I'm not very sure on the "as equal as possible" thing as of now. Open the Attribute table and start editing. QGis, a GIS software which is easy to use has 294 members. To add another filter, repeat these steps. Once the join is created, you will see that the attributes of the comp table are now linked, with a comp_" prefix, to the soil attribute table for rows with identical mukey values for both the soil and comp features. Do you have any suggestions?. Selecting features in attribute table using maximum aggregate function. We can tell the GIS Application to give each unique string or number its own colour and symbol. Extract Data creates an item in Content containing the data in your layers. One of the plugins I’ve been using is Group Stats. I faced the same issue and I developed a QGIS plugin to solve it. QGIS 3 Categorize, and Attribute form Lene Fischer. 12: A new "random marker fill" symbol layer type, which fills polygons by placing point markers in random locations; You can read more about our SLYR ESRI to QGIS compatibility tool here, or email [email protected] d) Click on the Entity and Attribute Information link to find out what the. If you add multiple filters, you have the option to display features that match any or all of the filters. js map using QGIS with no HTML/JavaScript/CSS programming. To do so, we will use this simple ArcToolBox tool “Extract by Attributes” that belongs to the tool group “Extraction” in the “Spatial Analyst” toolbox. If you are a country user group, please try to hold a funding drive within your user group and pass the funds either to the upstream QGIS. Output options: A shapefile or KML file with vector features. We will be using the JTC roads from the JIE GIS dataset. For example, if you have a layer of counties, and each county has a State_Name attribute, you can dissolve boundaries using the State_Name attribute. The output layer type is Line, not PolyLine. Census Bureau᾿s American Factfinder and census Tiger Line shapefiles and then join the two and display the data on a map. e either "Point", "Line" or "Polygon"?. To group all duplicates at the top, right click the column, select Sort Enter the above expression without the >1, and deselect Sort ascending. In my case, I have points representing trees and each tree has its species name as an attribute. =20=20 These issues were found using the Windows version of QGIS. Sometimes the attributes of features are not numeric, but instead strings are used. However using the concatenate parameter of the doesn't allow use of a group_by function and the list i generate appears in a random order. In the forms mode of the QGIS attribute table there is a side column one can use to directly jump to a specific feature. I'm going to play with the mapping capabilitites of D3. The second way to derive X and Y is to use the Field Calculator. Right-click on the layer and select Open Attribute Table. Quantum GIS is an opensource desktop GIS tool that supports ESRI Shape, MapInfo Tab/MIF, PostGIS and various raster formats such as GeoTiff, ErDas Imagine, Jpeg 2000, ERMapper (ECW), and ESRI ArcInfo ASCII Grid. The purpose of this tutorial is to provide guidance on how to create polygons using the QGIS software. But hey, after all we are a bit lazy and on the one hand like to have an ice cream later on that afternoon and on the other hand like to avoid errors. It has both viewing and some rudimentary editing and attribute querying capabilities. I'm going to play with the mapping capabilitites of D3. Attributes are not checked, so in case two features have identical geometries but different attributes, only one of them will be added to the result layer. I would like to use data from my own country, Norway. Working with the Attribute Table¶ The attribute table displays information on features of a selected layer. The attribute tables of hosted feature layers contain columns (fields). I have an interesting problem in QGIS, I have a vector layer of points (shown in purple) and a layer of polygons (green) with a number of metadata attributes attached (i. Versioning a PostGIS schema. Create a new map in QGIS called HW2. We will be using the JTC roads from the JIE GIS dataset. QGIS-GRASS-PLUGIN - Currently incomplete until QGIS 2. Organize your map through a Group. Geometry edits get saved though. You received this message because you are subscribed to the Google Groups "QGIS Australia User Group" group. Even if the WFS service URL is the same as a. or with QGIS' OSM downloader plugin •download area has to be defined (boundaries of a rectangle) •downloaded. This page shows you how to change an attribute data type in QGIS via Table Refactor Field Tool. Some of them are in fact calling external applications, such as SAGA or GRASS GIS, which is why the algorithms are organised by provider. You will now be able to see the attributes of the *. When using the Select by Attributes tool, query operators such as IN, LIKE, OR, and NOT can be used to determine the type of selection for multiple values. Select "Keyhole Markup Language [KML]" from the Format dropdown list. Image maps are black-and-white images where each pixel’s colour value is read and translated into a corresponding attribute value. or with QGIS' OSM downloader plugin •download area has to be defined (boundaries of a rectangle) •downloaded. Quantum works on Windows and Unix. Most features presented in the following chapters will be explained and described in their own sections later in the manual. Introduction to QGIS Every vector layer has an attribute table, holding the data behind the layer UK QGIS User Group (Google+):. This is the result of our query and you are seeing all places from the dataset that have the pop_max attribute value greater than 1,000,000. Because of its support for viewing PostGIS data and strong cartographic capabilities, the two are often found paired together. All parameters are expressions, which allow you to freely use the QGIS expression engine to define each of those parameters, which includes access to all features attributes. Chapter 8 Page 115 Intro to GIS, VT Geo. Ireland QGIS User Group Blog Menu. QGIS Label group of polygons with single text fro the attribute field Suppose you have a vector layer that contains polygons with the same attribute values as seen below. You will notice that a subset of points is now rendered in yellow. Although QGIS is described as intuitive, it. Sometimes the attributes of features are not numeric, but instead strings are used. And the Form view shows feature identifiers in a first panel and displays only the attributes of the clicked identifier in the second one. The output layer type is Line, not PolyLine. Coming in QGIS 3. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: