![]() ![]() With the map centered on Alpine, I clicked Preferences on the Edit menu, and clicked on the My Coordinate Formats tab. I used the Go to Address command, and had ExpertGPS create a waypoint at the city center of Alpine, TX. To take advantage of this, you’ll need to load some data for the general area where your mystery data is located. To make it really easy to find the correct coordinate format, I’ve built a special feature into the Add Coordinate Formats dialog that instantly shows the coordinates for the location you’re viewing on the map in each format listed in the Add Coordinate Formats dialog. Comparing your X,Y coordinates to the formats in ExpertGPS The Texas SPCS page on shows Brewster County is covered by Texas South Central SPCS (as well as the Statewide and Lambert systems). A quick Google search for “Alpine TX county” reveals that Alpine is in Brewster County. Luckily, also lists the counties each of these coordinate systems cover. You could try converting your data using each of these State Plane systems, and see which one gives the correct results. Clicking on the link for Texas SPCS lists several possibilities: TX South, TX South Central, TX Central, TX North Central, Texas North, as well as the Texas Statewide Mapping System and Texas Centric Mapping System Lambert. Picking the right US State Plane Coordinate SystemĮ has a reference list of every US State Plane coordinate system. Since the data is in the United States, and these clearly aren’t latitude/longitude coordinates, and US National Grid coordinates would be formatted differently, we know we’re dealing with UTM or US State Plane coordinates. My first question, when an ExpertGPS doesn’t know the exact origin of the data, and therefore the coordinate format used, is “what town does this data cover?” For this tutorial, let’s try to figure out the correct format for these coordinates: 145537, 4291885, which should be located somewhere around Alpine, TX. If this ever happens to you, try the following: Where is this data from? I help ExpertGPS users convert data every day, and I often get emailed X,Y data without knowing the proper coordinate format. ![]() It’s usually a simple task to tell the various lat/lon formats apart, but when given unknown gridded X,Y data, it can be difficult to tell if it is in UTM, US State Plane, or a national grid format, since all three use Eastings and Northings. Here are some tricks to make it easier to determine the correct coordinate format using ExpertGPS. In a few seconds, you’ll have elevation data, and you can use the Show Elevation Profile command on the Track menu to plot the elevation at every point along your hike, ride, or drive.Sometimes you’re given a set of X,Y or Easting,Northing data in an unknown coordinate format. ExpertGPS will determine the elevation for each point, using the best-available data from the US Geological Survey and NASA’s Space Shuttle Radar Tomography Mission (SRTM). Simply select the waypoints, routes, or tracks on the map, and click Get Elevation. Now, using the Get Elevation command on the Tools menu in ExpertGPS, you can add elevation to anything. In the past, when you drew a track on the map in ExpertGPS, or imported driving directions or trails from Google Earth or another 2D mapping source, you wouldn’t have elevation data available. The July 2009 release of ExpertGPS features a new tool to calculate the elevation of any location in the world, and add that elevation data to any waypoint, route, or track. My problem is that I would like to have elevations in the exported tab-delimited tracking file, but at the moment I can’t figure out how to do that. One of the file types that I export from ExpertGPS for use in my application is a text-delimited tracking file. I can import these kml files into ExpertGPS and I can then export from ExpertGPS the files I need for my application. I have very limited export options but I can export tracks in kml format. I am creating the routes in the Google Maps API application because the ultimate target application also runs on the Google Maps API. For a project, I am using a Google Maps API application to create cycling routes. ![]()
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