0
comments
|
Monday, December 06, 2010
Follow the steps below to view GPS coordinates on fully featured maps.
1. Download and install Quantum GIS
in Ubuntu, go to Applications > Software Center > QGIS
for Windows, Download the .exe file from here and install it.
2. After installation, start QGIS (Ubuntu - Applications > Science, Windows has a desktop shortcut installed) and go to Plugins > Fetch all python plugins and install all available plugins.
3. Create a folder on your computer called GIS
4. Farther down this page, click on and download the Index Image.jpg and the Index Image.wld files - place them both in your new GIS folder. The displayed image is the .jpg file. The .wld file tells QGIS how to precisely position the .jpg image.
5. In QGIS, go to Layer > Add Raster Layer > navigate to your GIS folder > select the Index Image.jpg file.
6. Maximise the QGIS display area, right click on the top, grey toolbars and deselect everything except: Layers, Map Navigation.
Next, click "Zoom Full".
Your screen should now look like this.
Click File > Save Project As and save to desktop. In Windows, now delete all other QGIS desktop shortcuts as this will be your program start-point.
To view available maps in QGIS, scroll down this page and download both the .jpg and the .wld files to your GIS folder. Add the map.jpg to QGIS in the same way you added the Index Image above. In the Layers window, click and drag the Index Image and place it at the bottom of the list of maps.
Zoom in using the + or - symbols and clicking on the map, or by selecting + and click/drag/select a square on the map to zoom directly to that square.
Example images from QGIS CambodiaMaps - the green dots are the individual GPS readings making up the trails.
JICA 1:100,000 series
JICA 1:100,000 and Military 1:50,000 alternately
The maps available on this page cover the entire country; select using this index.
Below are some links to files containing GPS tracks. Download and save them to your GIS folder, then load them to QGIS via the "add delimited text layer" plugin in QGIS. Plugins > Delimited Text > Add Delimited Text layer
Keep the text files at the top of the list in the layers window.
If anyone has any GPS tracks that they would like to add to this list, please send the .gpx file to cambodiamaps(AT)gmail.com and I'll include it here.
0 Comments:
Post a Comment
Links to this post:
Create a Link
<< Home