Tag Archives: USA Photomaps

Limitations of USA Photomaps

screen.JPG USA Photomaps is a great tool to use with a GPS and to explore an area you are working in. However, there are some limitations that you should consider.

  • Some of the data is old. This is controlled by the people at Terraserver. For most forest uses it doesn’t matter much. It’s more an issure where development has occurred, or if there were logging operations or other land changes.

  • USA Photomaps is a mapping tool, not a GIS. It’s missing some functions you would expect. But you can’t beat the price. Also, many times it’s better to have a simpler tool and bring out the big guns later.

  • USA Photomaps uses UTM coordinates, as does Terraserver. The maps are discontinuous between UTM zones. You have to keep scrolling to come to the next zone.

USA Photomaps

After Monday’s class here are some of the things you should be able to do with USA Photomaps:

  • Download and install the program.
  • Open a new map location.
  • Zoom in and out
  • Switch between aerial photo and topo map views.
  • Change the coordinate system view.
  • Download and install DEM’s to display contour lines
  • Display contour lines and determine the contour interval.
  • Connect a Garmin GPS receiver to the serial port.
  • Configure USA Photomaps to connect to a Garmin GPS.
  • Connect the receiver and download waypoints.
  • Download and display a track (Hansel and Gretel breadcrumb trail)
  • Print a map.
  • Download and display TIGER Maps road network data.

Is there anything I’ve left out? More to come tomorrow.