Notes on how to use ArcGis
Importing GPS Data
First we used a USB GPSMap 76 CS Garmin to find points. This was preliminary work while we were waiting to get the survey equipment.
To import the points we use the DNRGarmin add-in for ArcGIS. It works beautifully! Import the track as points. This will create a ShapeFile.
Use the 3dAnalystExtension to make a Surface TIN out of the shape file. Now you have the surface data you need to drape the image over.
Rectifying the Image
Assuming you have an image, you need to import and add it to the project. (By the way you may want to look at the ArcCatalog for more info on this). Once you have the image imported, use the GeoReferencing toolbar to Move the image in place by repeatedly using
- Fit to Display
- Scale
- Shift
- Rotate
Once you are about there, you can use the add control points tool to scale the image and move it into place. See the RectifyingImage.pdf tutorial for extended directions.