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I can find five foot contours for most areas, where can I find 1 foot or 2 foot contour lines?

Prefer ArcGIS or AutoCAD but will take anything I can get.

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    There's a stackexchange site dedicated to open data: opendata.stackexchange.com – csk Jan 24 at 22:33
  • If you can find 5, then you can make 1 or 2, the same way that anyone else would. The challenge is sacrificing neither accuracy nor consistency. I'd be curious to see the metadata of the 5ft contours. BTW, are you sure that you need contours and not DEMs? – Tom Jan 24 at 22:33
  • you may also find it useful to know that topo line data is often called "hypsography", for example the topo lines available to download from the Ohio Geographically Referenced Program (OGRIP) website ogrip.oit.ohio.gov/Portals/0/… – csk Jan 24 at 22:37
  • I am sorry the question was unclear or not useful, I just noticed the downvotes! Here is the context: I am a landscape designer with some advance GIS skills. I need one foot contour lines for site design. National Map (USGS) provides one meter DEMs and 10 foot contour topographic maps. I am seeking elevation data at finer resolutions. I know that I can derive one foot contour lines from available LiDAR, but I don't have much experience in that. – TobyG Feb 19 at 17:57
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I've got contour line vector tiles as well as gpkg vector features ready for offline mapping. Plus can generate contours of any interval we have Aster 2 GDEM, SRTM and USGS 3DEP NED as elevation tiles for rapid Geo processing. Also have quantized mesh terrain tiles and elevation tiles PNG. MAPS at TechMaven.net

  • Can you please state outright that TechMaven.net is for a geospatial services firm and your personal connection to it? – mkennedy Jan 25 at 20:30

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