![]() ![]() Anyone can contribute to OpenStreetMap, and OpenStreetMaps data is free to share and use. 2 I keep getting a notice that I have no internet connection and can't download the maps. OpenStreetMap is a collaborative map of the world that creates a world map. As you mentioned, it wouldnt be accurate enough for a legal description. For example, the Garmin 60C will do this as explained on page 36 of the manual. GPX files store GPS waypoints, routes, and tracks, and any line or polygon data you import from other programs. Your data is stored in GPX files, while the maps are managed behind the scenes by ExpertGPS, and stored on your hard drive. Many of them will compute the area of a bounded track. ExpertGPS displays your GPS, GIS, and CAD data over street and topo maps and aerial photos. As you move around the map, ExpertGPS will retrieve map data over the Internet and display. Posted Octo(edited) You may be able to use your GPSr to measure the acreage. This problem exists on both of my computers, one at work 1 meg DSL line and my home computer that has a 56k line. ExpertGPS shows your GPS data on street maps. All other areas are limited distribution.ĭNC provides global marine navigation information between 84 North latitude and 81 South latitude and supports a variety of Geographic Information System applications. The states Hawaii and Alaska that I downloaded from Expert GPS will not allow me to do any aerial photos from any of the waypoints. DNC, for areas in which the US is the prime charting authority, is unclassified. It relies on various Internet map servers to provide these mapping services. The Digital Nautical Chart (DNC) is produced by the National Geospatial-Intelligence Agency (NGA) and is a vector-based digital product containing maritime significant features essential for safe marine navigation. ExpertGPS allows you to view street maps, topo maps, aerial photos, and nautical charts.
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