Open Aerial Photography
- Double click on your YourCountyName.sid file to open the TatukGIS viewer
Add the USGS Topo Map
- Right click inside legend on right side of screen - select ADD
- Navigate to c:\TopoMap and select YourCountyName_DRG24K.sid
(this may be in c:\AirPhoto is you bought Aerial & Topo together)
Set the USGS Topo Map to transparent
- Double click on YourCountyName_DRG24K.sid in the legend to bring up the properties box
- In the properties box, select Layers, then type 25 for the Transparency value - Select OK
Set The map Units
- On the top bar menu, Select Map >> Map Units >> set to Meter
Zoom to your area of interest.
- The TOPO map is readable between 1:8000 and 1:30,000.
Here is what it should look like.
I have right clicked in the legend to show the ADD button.
Note that the DRG24K file is on top of the aerial file.
