gmap test.mpGMap should load the file and display your data on the main window GMap will centre the display on your data (but it won't adjust the scale). If no objects are visible, zoom out by pressing the (-) button few times. Once you see the data, point at it with the mouse and click the left button. That will centre it. You can then zoom back in with the (+) button.
GMap uses the left mouse button to centre and the right button to select. When you select an object, the cursor will chamge from an arrow to a plus. Hitting the right button again will de-select the object.
The feature buttons (points,lines,areas,routing,warp) will determine what type of
object you can select. When an object is selected, the left mouse button will perform the action selected by
the action buttons (move/add,delete,drag).
Depending on the type of object you have selected, some of the operation buttons will be enabled.
Edit-Undo Will attempt to undo the last operation performed. The undo stack is very deep so you can go back a long way, however there is no re-do. Undo does not undo file operations or warp operations. Be aware that one you apply a warp, the undo history is pretty useless, since it will restore individual unwarped objects.
GPS menuThe GPS menu allows direct transfer of data from some Garmin GPS receivers. I have
tested it with a garmin GPSMap 60CSx and a ForeRunner301. It may work with others. If it doesn't work with your Garmin GPS, let
me know. I would not expect it to work with any other brand of GPS. The GPS is assumed to be
connected to "/dev/ttyUSB0". This can be over-ridden by the --gpsdev command line option.
GPS-load tracks/GPS-load waypoints Load all tracks or waypoints from the GPS into the current working map.
GPS-show position Read the current position direct from the GPS and display on the map.
GPS-make track read GPS position and create a track in real-time.
Move/Add: if you are near a feature (eg vertex of a line) click left and drag. If you are not near, it will probably create a new point in the feature you have selected.
warp/applywarp: This allows you to set an irregular rectangular grid over one image and to then move the points around to register one map against another. Within each 4 cornered area, positions are linearly warped to the new space. You can set up some corrections, then apply the to some map data, then further refine the corrections and re-apply. You can also hold and display a reference map that will not be warped.
Typical usage is as follows:
gmap imagetracks.mp --reference drivingtracks.mp
gmap drivingtracks.mp imagetracks.mp
In Warp mode the 'action' options allow moving/adding new warp points or deleting existing points.
More to come
|feature name||Garmin Type||Special processing|
|coastline:||Converted into a closed polygon (area) feature of type SEA|
|town:||Converted into a closed polygon (area) feature|
|airport:||Converted into a closed polygon (area) feature|