Assume we have a large file, such as a world limits polygon type layer, that we want to label with the names of the countries.

We do not want the labels to look like that.

Instead we want this.

Lets see how we can achieve this.

• Go to the Layer Proprieties (right-click it in the Layers Panel > Proprieties) and navigate to the Labels TAB.
• Select the labeling method > Single Labels.
• Next, select the attribute table field to use for labeling. In this case, we’ll go with the one that saves the names of the world’s countries.
• Choose a Font and a Style.
• For the Size, go to the Data defined override function. This function overwrites the labeling settings by using attribute table entries or expressions based on them.

• By selecting the Edit option, the Expression String Builder opens. In this section, we will write an expression that will allow us to label the world counties while considering the area values stored in the Shape_Area field.
• The expression will be as follow:

scale_linear(“Shape_Area”, minimum(“Shape_Area”), maximum(“Shape_Area”), 1, 100)

• This function transforms a given value from an input domain to an output range using linear interpolation. More specifically, the function scales the names of world countries to a font size between 1 and 100 by taking into consideration the minimum and maximum area values (stored in the Shape Area field).

• Click Ok.
• The dialog closes and the Data defined override button change its appearance meaning that the rule is taken into consideration while labeling.

• Click OK.  The Layer Proprieties closes. The result should look like in the following image.

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For more information check: 

• QGIS Documentation – 15.1.4.4. Using data–defined override for labeling
• QGIS Documentation – 12.2.17.23. scale_linear

Check Marks Credits: https://www.freepik.com/free-vector/flat-check-mark-cross-stickers_18141294.htm

The post Attribute Value Dependent Label Sizes in QGIS? first appeared on GIS Course | TYC GIS Training.

One easy way to do that is to use the LASzip, a free open source product of rapidlasso GmbH. The LASzip library is built into the LAStools, and while the LAStools is commercial software, the LASzip is available as an LGPL-licensed stand-alone software library.

*Keep in mind that the LAStools need to be installed on your computer. An easy way to do that is to go and download it by using the Direct link to LAStools.zip. Unzip the file to find the LASzip application in the bin folder.

Launch LASzip and follow the steps described in the image below.

We have 24 LAZ (.laz) files depicting the area around Toledo city (south of Madrid). The files are LIDAR-derived 3D point clouds colored in true colors (RGB).

A new window will appear after you click the DECOMPRESS button.

Click Start.

Once the decompression process is complete, navigate to the location of the LAZ (.laz) files in your Windows environment. You’ll notice that a new LAS (.las) file was created for each LAZ (.laz) file (with the same name).

Now we can work (open or add the LAS (.las) files) directly in ArcGIS Pro.

Open a new ArcGIS Pro project.

To work with all the LAS (.las) files at once we need to create a LAS dataset using the Create Las Dataset tool.

The LAS Dataset is created. A LAS dataset keeps track of one or more LAS files located on disk.

Next, select the option to filter the 3D cloud points and display only the ground points. Follow the instructions in the image below.

Now, with only the ground points displayed, we can proceed and create a DEM for the area. Access the tool LAS Dataset To Raster.

The DEM is created.

Specify a proper symbology.

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The post DEM creation using LASzip and ArcGIS Pro first appeared on GIS Course | TYC GIS Training.

In the next steps, we will exemplify how to add two maps from this valuable site to ArcGIS Pro and ArcMap.

Scroll down and from all the available options, we will choose a map from the Europe category.

It is important to note that signing up for an account and logging in allows you to access all of the collection’s features. The registration process is simple and can be done by hitting the Register button.

Considering all the available maps, we chose Europe’s overland and sea communications from 1922. If you are not able to find it, filter the results by the year (1922).

By clicking on the map, a new web page will open. Once opened, on the left, you will be able to see all the map media information (collection name, author, date, title, scale, etc.).

Next, Click on VIEW IN GEOREFERENCER button. This will “georeference” the map and place it over real world locations. Now, you can navigate and explore the map.

Several options are available:

1. Find a place option,
2. Changing the basemap,
3. Beyond the adjustable transparency, you can analyse map points and their coordinates or adjust map size,
4. In the Overlay & Compare box there are several options to visualize and compare the map with other added maps.

1.

2.

3.

4.

After we’ve explored all of these features, we can click on What next? button and start export, embed, draw and more!

By going to Use in GIS apps section, we can proceed and visualize the historical map in ArcGIS (ArcGIS Pro or other GIS software) as a WMTS service. Click on Get Links button.

Copy the Web Map Tile Service (WMTS) link.

In ArcGIS Pro we will navigate to the Insert menu Connections > Server > New WTMS Server. We will use the link copied to create a new WMTS Server connection.

Once created, the new connection will appear in the Catalog pane in both Servers and Folders section.

Next, just add it as a new layer to your map view. The historical map can now be explored in ArcGIS Pro as a WMTS.

Source: The David Rumsey Map Collection – https://www.davidrumsey.com/home/the-collection

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This plugin provided by OpenPlanetary allow us to access various basemaps of Mars and The Moon. To explore its functionalities install the plugin in QGIS via the Plugins Manager.

Once installed, the OpenPlanetary Tile Loader icon is displayed in the Plugins Toolbar, as illustrated in the picture below:

Once opened, you can add Mars and Moon basemaps into your QGIS Project.

Let’s add the Mars Colour MOLA elevation basemap into our project.

Mars Shaded Grayscale MOLA Elevation

OPM Mars Basemap v0.2

In this way, we can get much closer to the surface of these celestial bodies and learn a lot more about them.

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Sources: 

Original post: Nuevo “plugin” de QGIS: “OpenPlanetary Tile Loader” – https://www.cursosgis.com/nuevo-plugin-de-qgis-openplanetary-tile-loader/

OpenPlanetary Tile Loader plugin – https://plugins.qgis.org/plugins/optileloader/

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First of all, open the QGIS software and install the QuickMapServices plugin by going to the Plugins menu toolbar > Manage and Install plugins. The QGIS Plugins manager opens.

Type “QuickMapServices” in the search box and proceed by installing the plugin.

Once installed, an icon should appear in the Web Toolbar, as demonstrated in the image below:

When we click on this icon, we will see that we are limited to only NASA and OpenStreetMap basemaps. However, we can work this out by selecting the Settings option from this menu.

In the new window that will open, go to the “More services” tab and click on the Get contributed pack. This will add new services/basemaps to your QuickMapServices Plugin.

As a result, we have a list of 14 providers who offer a variety of services/basemaps.

Let’s explore the main basemaps available here.

• The ESRI package is one of the most comprehensive, with 15 available basemaps to add.

• The Google package includes some well-known options.

• In addition, the OSM package includes some interesting options.

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Sources: 

Original post: Quick Map Services: un plugin de uso sencillo para utilizar mapas base en QGIS
– https://www.cursosgis.com/quick-map-services-un-plugin-de-uso-sencillo-para-utilizar-mapas-base-en-qgis/

QuickMapServices plugin – https://plugins.qgis.org/plugins/quick_map_services/ 

The post QuickMapServices Plugin – an easy way to add basemaps in QGIS first appeared on GIS Course | TYC GIS Training.

One of these is the “Globe Builder,” plugin, which can add a globe to your map or layout. The plugin can be installed easily by going yo to the Manage and Install Plugins (under the Plugins menu toolbar).

Once installed, you can open the plugin by going to the the Plugins menu toolbar. By clicking on the Build Globe view, a new window will open. It is preferable to maximize it.

In this Globe Builder new window select: data sources according to your preferences, the projection, and the coordinates based on which the Globe will be centered. Following these steps, you can add the Globe to a Map or to a Layout.

If you prefer to change the globe appearance, you can change the settings in the Visualization section (in the same Globe Builder plugin window).

The globe added to a map.

The globe added to a layout.

If you want to learn more about how to use QGIS, TYC GIS offers a variety of training courses at varying levels of difficulty, which are almost certainly relevant to your interests.

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The QGIS OSMDownloader plugin lets you download OSM data while preserving the symbology.

To be able to do that, we first need to install the OSMDownloader plugin.

After the plugin is installed, we can go and activate and deactivate the OSMDownloader toolbar.

Next, with the Download OSM data by rectangle selection button (located in the OSMDownloader plugin toolbar), draw a rectangle over the area of interest to load downloaded *.osm files as QGIS layers.

The OSMDownloader dialog box appears. Specify a location on your computer to save the .osm file.

Click Ok. Depending on the size of the rectangle you drew, the download will take some time. When the download is complete, a Success, the file has been downloaded will pop up.

Now you can see the downloaded files in the Layers Panel as well.

Click Ok. Turn off/deactivate the OpenStreetMap basemap and zoom out slightly.

The OSM layers that are available within the drawn rectangle have now been downloaded to your computer. The OSM symbology is preserved in the layers.

By inspecting their symbology, we can manage the OSM symbology and perform various operations such as changes to the adopted styles, style export, and so on.

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Sources: 

Original post: Descarga de datos de OpenStreetMap (OSM) con simbología en QGIS – https://www.cursosgis.com/descarga-de-datos-de-openstreetmap-osm-con-simbologia-en-qgis/ 

OSMDownloader plugin – https://plugins.qgis.org/plugins/OSMDownloader/ 

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In consequence, the students will learn:

• how to create, edit and manage raster data files;

• how to perform advanced multi-criteria analysis;

• how to manage spatial data within a geodatabase (native data structure for ArcGIS);

• how to use the ModelBuilder to create complex and automated geoprocessing workflows.
• how to use the geodatabase topological rules in order to ensure GIS datasets connectivity;
• how to determine the quickest or shortest route to reduce travel time or distance;

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The post What you will learn in the new ArcGIS Pro Advanced Level Course first appeared on GIS Course | TYC GIS Training.

The training materials of this course will concentrate on:

• the main ArcGIS Pro user interface components (the ribbon view, panes, views, etc.);

• data models (vector and raster data models);

• data interaction tools, data symbolization;

• Coordinate Systems (projections and georeferencing);
• creating and editing data;
• joins and relates between layers and tables, spatial joins;

• geoprocessing tools (extract tools, overlay tools, manage data tools, generalization tools, proximity tools, etc.);

• map-making (map layouts, map elements, map printing, etc.).

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The post What you will learn in the new ArcGIS Pro Beginner Level Course first appeared on GIS Course | TYC GIS Training.

PEARL is a platform developed by “Development Seed” that make use of AI to quickly and effectively run LULC mapping workflows.

As a user you can access the platform for free and see how it works. In order to explore its capabilities we need to register first. To do that, press the Sign Up to Start Mapping and fill in the information required.

Once your account is created and you managed to log in, click on the Launch App button.

Now we can start exploring the application, first we need to give a name to our project.

Once the project is created, we have to draw an area of interest in the map or just upload a GeoJSON file that capture our area of interest (AOI).

Please note that you can only work in certain areas (located in the United States) and the area of interest (AOI) is limited to 100 square kilometres. We will zoom in to an AOI next to the city of Baltimore. Using the Draw area of interest button sketch an area below 100 square kilometres.

Next, go and select a Starter Model. In this screen display you can find more information about the data used by the model, class distribution, training areas, etc.

Once the model is selected, click on Ready for prediction run. Now wait until the predictions are ready and the LULC map for your AOI is generated.

By going to the Refine Results you can refine your results.

Also, by selecting the Export button we can export and download the LULC map on our computer (.tiff format) and use it in QGIS (for example).

PEARL is an easy way to get  LULC data for your projects.

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Sources: 

Original post: PEARL: plataforma que cartografía la cobertura terrestre a través de Inteligencia Artificial – https://www.cursosteledeteccion.com/pearl-plataforma-que-cartografia-la-cobertura-terrestre-a-traves-de-inteligencia-artificial/

PEARL Planetary Computer Land Cover Mapping – https://www.landcover.io/about#guide-models

The post PEARL: ML and AI land cover mapping platform first appeared on GIS Course | TYC GIS Training.