GPS for Dummies.pdf - Engineering Surveyor

Chapter 14: From the Air with USAPhotoMaps239Importing tracksUSAPhotoMaps can interface directly with your GPS receiver and download current track data.However, if you want to import existing GPS track logs into USAPhotoMaps, the data needs to be ina comma-delimited text file in the following order:Track name, UTM zone, Northing, Easting, Hour, Minute, Second, Month, Date, Year, Altitude (in meters)The first line of the file contains the field information and should exactly read as follows:Track,UTM Zone,UTM Northing,UTM Easting,Hour,Min,Sec,Month,Date,Year,Alt(Meters)The second line of the file starts listing the track data. An example line of data looks like this:SKI,10,4873291,605991,17,56,30,11,29,2003,1935.27Each line of data must have ten commas and end with a carriage return. The minimum amount of trackdata required is the UTM zone, Northing, and Easting.Probably the easiest way to manipulate previously saved track data is to load a comma-delimitedfile containing the tracks into a spreadsheet and then arrange the columns of data.Click the mouse to add a waypoint wherever the cursor is currently positioned.You’ll be prompted to enter a description and a name (to identify the waypointif you upload it to a GPS receiver). The waypoint will be displayed as a dot onthe aerial photo or the map. Right-click the mouse button to display a list ofwaypoints.Reviewing Other Aerial Photo SoftwareUSAPhotoMaps isn’t the only program that uses TerraServer-USA data to displayaerial photos and maps. Other mapping utilities have the same basic functionalitywith additional features. These programs are inexpensive, rangingfrom free to around $60. If you like USAPhotoMaps, take the time to downloadand try a few of these programs to see whether they meet your mapping needs.TerraClientBill Friedrich’s TerraClient is a free, easy-to-use Windows program that displaysTerraServer-USA aerial photos and maps. It doesn’t interface with GPS