In some situations, you may want a specific area on the map to have a different representation from the one offered by the map service. For example, you may prefer a different style of map, or you may need to include particular landmarks and symbols.
The Local Map plugin view provides tools for creating detailed maps from image files and managing the resulting maps. You can do the following:
- Turn a JPEG image into a map area by associating points in the image with real-world coordinates
- Make your custom map appear in the Map Tools view and on mobile clients' maps as an overlay
To make a detailed map for an area, take the following steps:
- Make sure you have the map image in JPEG format (convert if necessary) in a location that is accessible from your T.Rodon workstation.
- Open the Local Map plugin view by clicking the Local Map button in the right pane toolbar.
- Click the Management button at the bottom of the right panel. The Local map management dialog box opens.
- Click the New button.
- Specify a meaningful name for your map in the Local Map name text box.
- Supply the image file you have prepared. For that, click the Choose button.
- Click Save. The initial version of the map is created, and a unique ID is generated automatically for it.
- Proceed to associate points on the image with coordinates in the world. For that, click Calibrate. The Calibration level dialog box opens.
The right panel shows a list of four points by default – four is the minimum number of points required for map calibration. You can add more points by clicking the Add point button or delete unnecessary points by selecting them and clicking the Delete point button.
- For each point in the list, do the following:
- Select the point.
- Click somewhere on the map to place the marker for that point. The marker is relocated every time you click, and the values in the X and Y table columns update automatically.
- In the Lat and Lon columns for the point, manually type the latitude and longitude of the location in the world that corresponds to the point in your map image. To look up the latitude and longitude, use an external map service such as Google Maps – they display the coordinates of markers that you set.
Note: To estimate how good your calibration is, use the Calculate accuracy button. Keep calibrating until you are happy with the result.
- When you have finished calibrating, click Apply and then Close.
You return to the Local map management dialog box. Notice that the Is calibrated check box is now selected.
- Specify where you want the map to appear by changing the value of the Visibility mode drop-down menu. The recommended choice is All.
- Сlick Save to update the list of maps. You can now safely close the Local map management dialog box.
After that, your custom map will be overlaid in the right place in the T.Rodon map interfaces that you have specified.
You can modify an existing detailed map at any time. For that, click the Management button, select the map you need and change its settings: rename it, update its image, change its visibility or recalibrate it. You can also delete the map altogether.