Define Raster Map


Define Raster Map

The Define Map function will automatically open the specified raster map image and allow you to click/define two points on the map image. RASTRAC will then automatically build a legend file from your specified points.

The procedure for defining a new map is listed below.

1. Create a compatible raster image and copy it to the RASTRAC map directory (C:\Rtmx\Map\ or C:\Program Files\RASTRAC\Map\).
   
   
2. Make a note of the latitude/longitude locations of two distinct points on the map image. For best results, the points should be significantly separated from each other on the image.
   
   
3. Run RASTRAC, and select the Map... Raster Map... Define menu item. You will be prompted to select the map image type and filename. When you select the file, the image will be opened automatically, and you will be prompted to click on the first reference point in the map image.
   
   
4. Click on the first reference point. The dialog box instructions will prompt you to enter the latitude and longitude for the point on which you clicked. You may enter the latitude and longitude in any of the compatible formats described in Location display & entry formats. Select OK after entering the first point's location.
   
   
5. The dialog instructions will now prompt you to click on the second reference point.
   
   
6. After you click on the second reference point, you will be prompted to enter the location of the point on which you clicked. You will not normally need to enter a skew value (this option is for special maps that are not north aligned).
   
   
7. After entering the second point's location, click on OK.
   
   
8. If your entered points are valid, RASTRAC will display a message telling you that the map is ready for use.
   
   Unless a valid vehicle's location falls inside the new map's boundaries, the image will automatically close after you define it. You can test the new map definition by using the Map... Open function, and then watching as the location of the mouse changes when you move the mouse around on the map.
   
   If the map definition fails for any reason, you can redefine the map at any time by performing the steps above.