Lesson 2 - Load a Vector Cartesian Map
- 3 minutes to read
This is the second tutorial in the Getting Started series for the Map control. It guides you through the process of creating a simple map application that draws vector data using Cartesian coordinates.
The DevExpress Map control supports displaying both Geographical and Cartesian maps. The Geographical maps usually show geospatial data using geographical coordinates (latitude and longitude), while Cartesian maps use X and Y coordinates to draw building plans or any other Cartesian data.
This tutorial consists of the following steps:
- Step 1. Add a Map Control
- Step 2. Customize the Map Control
- Step 3. Load Vector Data
- Step 4. Customize a Colorizer
- Step 5. Customize a Legend
Step 1. Add a Map Control
- Run Microsoft Visual Studio 2012, 2013, 2015, 2017 or 2019.
- Create a new Windows Forms Application project and add the MapControl component to it. (See the first step in Lesson 1 to learn how to do this).
Step 2. Customize the Map Control
Do the following steps to prepare the Map control to draw a Cartesian map and customize control settings:
Specify the MapControl.CenterPoint property value as shown below.
Step 3. Load Vector Data
To add a vector layer and bind it to data, do the following:
- Select the Click here to add layer link on the map control surface.
In the invoked list, select the Vector Layer | Load from Shapefile item.
In the Open dialog, locate the C:\Users\Public\Documents\DevExpress Demos 20.1\Components\Data\Hotels\Hotel1.shp file and click Open.
Then, run the Layers Editor as shown below.
In the editor, set the CoordinateSystemDataAdapterBase.SourceCoordinateSystem property value to CartesianSourceCoordinateSystem.
Close the editor and run the application. It should look as follows:
Step 4. Customize a Colorizer
To configure a colorizer, run the Layers Editor as you did in the previous step.
Specify the NamedAttributeProviderBase.AttributeName property as shown below.
- 1 - Restaurant
- 2 - Business room
- 3 - Bathroom
- 4 - Living room
- 5 - Other
- 6 - Service room
- 7 - Pool
- 8 - Gym
Run the application. It should look as follows:
Step 5. Customize a Legend
To add a legend to the Map control, do the following:
Locate the MapControl.Legends property in the Properties window, and click the ellipsis button to invoke the Legends Editor. In the editor, select the ColorListLegend from the drop-down list and click the Add ColorListLegend button.
Set the MapLegendBase.Header property value to Room Type.
Finally, assign the customized vector layer as the ItemsLayerLegend.Layer property.
Run the application to see the result.
A complete sample project is available in the DevExpress Code Examples database at http://www.devexpress.com/example=T171499.