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GTOPO30 is a digital elevation model for the world, developed by United States Geological Survey (USGS). It has a 30-arc second resolution (approximately 1 km), [1] and is split into 33 tiles stored in the USGS DEM file format. According to DTED and USGS DEM the absolute vertical accuracy of GTOP30 varies from ±30 meters. [2]
Some of the free software mentioned here does not have detailed maps (or maps at all) or the ability to follow streets or type in street names (no geocoding). However, in many cases, it is also that which makes the program free (and sometimes open source [ 1 ] ), avoid the need of an Internet connection, [ 2 ] [ 3 ] [ 4 ] and make it very ...
Free: up to 7 downloads; In-App purchase for unlimited downloads (also unlocks all of the features except for contour lines, hillshade maps and nautical depth contours) [12] No: Yes: No: No: Lane guidance; OsmAnd+: OpenStreetMap: Android, iOS: GNU GPLv2 (except some 3rd party libs and resources) Free: As OsmAnd~ on F-Droid; Paid: On Google Play ...
Organic Maps functions entirely offline by allowing users to download maps in advance. Once maps are downloaded, navigation, search, and route planning do not require an internet connection. The app offers offline maps of the world, including cycling routes, hiking trails, walking paths, contour lines, elevation profiles, peaks, and slopes. [8] [9]
This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.
Here WeGo is a web mapping and satellite navigation software, operated by HERE Technologies and available on the Web and mobile platforms. It is based on HERE's location data platform, providing its in-house data, which includes satellite views, traffic data, and other location services.
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The data is free to download non-commercially and through the developer's website at a cost commercially. An alternative free global DEM is called GTOPO30 (30 arcsecond resolution , c. 1 km along the equator) is available, but its quality is variable and in some areas it is very poor.