Geography Reference
In-Depth Information
FIGURE 3-11
12. The GPS track should appear, superimposed on the color orthophoto basemap. Click with
the mouse pointer on the last fix (the one near the island) of the GPS track. What is the FID
number of this fix? ________. What is the northing (feet)? ______________ What is the easting?
______________ You can slide the map around by dragging.
13. Determine how to measure the length of the GPS track in Miles. (While measuring you might
have to be patient between clicks along the GPS track, since this process is happening
interactively, over the Internet.) _________ miles. Also under the Measure button you will find
Location. Click on it and choose Degrees. Note that, as you slide the pointer cursor around
the map, you get a display of the location of its tip. Click on the center of the last GPS fix.
Latitude ____________. Longitude _____________.
14. Drag the map so that the last fix is approximately in the center of the map. Use the vertical bar at
the upper left of the map (or the mouse scroll wheel) to zoom in as far as you can, while still being
able to see the imagery. Recheck the latitude and longitude (click Location again). You will see
some differences in the less significant digits, because zooming in gave you greater precision.
15. Click Save. Click Save from drop-down menu to place the map in your ArcGIS.com account. In
the Save Map window use the title
___IGIS-Web_ YourInitials _First_Map.
For tags put IGIS, River, and the identifier of the course you are taking (all comma separated, no
blank spaces). For Summary, put in any text that seems appropriate. Click Save Map.
16. Click Share. In the share window, put a check by Everyone. Ignore the other options on the
window, but write down the Link to this map. __________________ Click Close.
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