Topography Archives - GIS Geography https://gisgeography.com/tag/topography/ Geographic Information Systems Sun, 03 Aug 2025 12:36:47 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.3 https://gisgeography.com/wp-content/uploads/2019/01/cropped-GISGeography-SiteIcon-32x32.jpg Topography Archives - GIS Geography https://gisgeography.com/tag/topography/ 32 32 Triangular Irregular Network (TIN) https://gisgeography.com/triangular-irregular-network-tin/ https://gisgeography.com/triangular-irregular-network-tin/#respond Wed, 07 Feb 2024 14:35:00 +0000 https://gisgeography.com/?p=90122 A Triangular Irregular Network (TIN) is a way to represent a 3D surface. They can show complex surfaces such as slopes and elevation.

The post Triangular Irregular Network (TIN) appeared first on GIS Geography.

]]> https://gisgeography.com/triangular-irregular-network-tin/feed/ 0 What is Topography? The Definitive Guide https://gisgeography.com/what-is-topography/ https://gisgeography.com/what-is-topography/#comments Mon, 15 Jul 2019 12:00:06 +0000 https://gisgeography.com/?p=19256 Topography lays the underlying foundation of the Earth's surface. In this comprehensive guide, you'll learn everything about topography and topographic maps.

The post What is Topography? The Definitive Guide appeared first on GIS Geography.

]]> https://gisgeography.com/what-is-topography/feed/ 11 SRTM Shuttle Radar Topography Mission https://gisgeography.com/srtm-shuttle-radar-topography-mission/ https://gisgeography.com/srtm-shuttle-radar-topography-mission/#comments Wed, 04 Oct 2017 10:10:26 +0000 http://gisgeography.com/?p=16221 During an 11-day mission, Space Shuttle Radar Topography (SRTM) mission captured Earth's elevation at 1 arc-second (30 meters) for over 80% of the Earth.

The post SRTM Shuttle Radar Topography Mission appeared first on GIS Geography.

]]> https://gisgeography.com/srtm-shuttle-radar-topography-mission/feed/ 1 How to Download USGS Topo Maps for Free https://gisgeography.com/download-usgs-topo-maps-free/ https://gisgeography.com/download-usgs-topo-maps-free/#comments Sun, 30 Jul 2017 23:39:12 +0000 http://gisgeography.com/?p=15541 If you're looking for topographic maps (contours, place names & hydrography) for the United States, the first place to look is the USGS topo maps series.

The post How to Download USGS Topo Maps for Free appeared first on GIS Geography.

]]> https://gisgeography.com/download-usgs-topo-maps-free/feed/ 13 DEM, DSM & DTM: Elevation Models in GIS https://gisgeography.com/dem-dsm-dtm-differences/ https://gisgeography.com/dem-dsm-dtm-differences/#comments Wed, 09 Mar 2016 12:02:13 +0000 http://gisgeography.com/?p=5093 We explore the differences between DEM (bare earth), DSM (natural and built environment) and DTM (vector contours and regularly-spaced points).

The post DEM, DSM & DTM: Elevation Models in GIS appeared first on GIS Geography.

]]> https://gisgeography.com/dem-dsm-dtm-differences/feed/ 12 5 Free Global DEM Data Sources – Digital Elevation Models https://gisgeography.com/free-global-dem-data-sources/ https://gisgeography.com/free-global-dem-data-sources/#comments Wed, 02 Mar 2016 01:03:14 +0000 http://gisgeography.com/?p=10155 Want to elevate your chances of finding a digital elevation model? Sure you do. You should dive into our list of free global DEM data sources.

The post 5 Free Global DEM Data Sources – Digital Elevation Models appeared first on GIS Geography.

]]> https://gisgeography.com/free-global-dem-data-sources/feed/ 48