Product Manual

133
Miscellaneous
– Original file name re-used in the body of the filename,
– “rxcx” suffix to identify the row and column of the map
section,
– File extension (bmp).
Enabling/Disabling
a Background Map
in FAST Survey
1. Create a new folder in the root directory of your field
terminal’s memory card. This folder must have the same
name as the one created in “My documents” on the office
computer (“Maps” in our example).
2. Copy the IMD file as well as the generated BMP files to
that folder. You don’t need to copy the original image file
or the world file to the folder.
3. Remove the memory card from the office computer and
insert it into your field terminal.
4. Run FAST Survey and start a new job.
5. Tap in the upper-right corner of the screen.
6. Tap TOOLS>Place World Image.
7. Check on Use Image Database and Save Image Boundary
Points.
8. Tap on the Select Image Database button and find the IMD
file on the memory card.
9. Select the IMD file and tap twice.
10.Tap to adjust the zoom so the background map can
now be seen.
If later on you wish to hide the background map, simply
go back to TOOLS>Place World Image and clear the Use
Image Database box.
Determining
Georeferencing
Information for an
Image File
You may have no information at all that would allow you to
quickly georeference the image file of your background map.
In that case, you need to determine the following parameters
(illustrated in the diagram below) to be able to georeference
the image file:
1. Real coordinates of points A (x1, y1) and B (x2, y2), and
horizontal distance (D) between points A and B. Points A
and B are arbitrary points well distributed horizontally on
the image file and easy to spot both on the image file
(map) and in the field.
2. Real coordinates of point O (x0, y0) located at the upper-
left corner of the image file.
3. Image width expressed in pixels.