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Not to be dramatic, but I think this interactive sand map that shows changing topography is one of the coolest thin…
dem  geography  gis  terrain  visualization  vr 
november 2018 by aries1988
Roughness Map - WAsP - Global Mapper Forum
There isn't a special solution for this yet (we were kind of hoping WaSP would make their handling of roughness areas easier to use to avoid a messy workaround, but I don't know if this will happen). The best workaround for now is to create the buffers with a small negative distance to shrink the roughness areas so they don't touch each other since this is the problem. Really with roughness areas the ROUGH_L and ROUGH_R don't make sense as you really just need a roughness value inside the area and other areas can cover the outside areas, but Wasp doesn't quite work that way. Because of this the ROUGH_R value will be the roughness inside the area (for clockwise areas) and you can then edit the ROUGH_L to be an invalid roughness for the very tiny stripe between areas after shrinking them.
explained  tool  terrain  data  md  ofm 
october 2017 by aries1988
Mesh refinement · Issue #1 · jonasIWES/terrainBlockMesher
no, this is not entirely true. There is no preliminary mesh within the terrainBlockMesher. The block vertices are instead moved onto the stl (this is a much smaller number of points - especially if you select few blocks and many cells per block, thereby limiting the exactness of your approximation of the stl by the ground patch).

So, the mesher should do fine - until the last step, which in any case will take long: the blockMesh, which fills the blocks with cells. And you are right, this does not run in parallel.
mesh  terrain  ofm 
october 2017 by aries1988
WindSim - Terrain - Third party formats
The ESRI Shapefile .shp format containing contours must be filtered in order to only contain the contour line data before converting the data to the .gws format. The filtering can be done with the program Arcv2CAD converting .shp files into .dxf files. As a second step the .dxf must be converted to .gws as described above. The program Arcv2CAD is available at http://www.guthcad.com.au
format  explained  gis  terrain  wasp  map 
october 2017 by aries1988
Shuttle Radar Topography Mission - Wikipedia
The Shuttle Radar Topography Mission (SRTM) is an international research effort that obtained digital elevation models on a near-global scale from 56° S to 60° N,[2] to generate the most complete high-resolution digital topographic database of Earth prior to the release of the ASTER GDEM in 2009. SRTM consisted of a specially modified radar system that flew on board the Space Shuttle Endeavour during the 11-day STS-99 mission in February 2000, based on the older Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar (SIR-C/X-SAR), previously used on the Shuttle in 1994. To acquire topographic data, the SRTM payload was outfitted with two radar antennas.[2] One antenna was located in the Shuttle's payload bay, the other – a critical change from the SIR-C/X-SAR, allowing single-pass interferometry – on the end of a 60-meter (200-foot) mast that extended from the payload bay once the Shuttle was in space.[2] The technique employed is known as interferometric synthetic aperture radar.
radar  data  earth  terrain  md 
september 2017 by aries1988
NinjaFOAM Overview · firelab/windninja Wiki
Write blockMeshDict. During this step, xmin, xmax, ymin, ymax, zmin, zmax are read/calculated from the DEM unless the run was initiated with an STL file, in which case the necessary terrain information is read from log.json. This is the bounding box for blockMesh.
terrain  tool  mesh  ofm 
september 2017 by aries1988
Earth Resources Observation and Science (EROS) Center
ftp://edclxs71.cr.usgs.gov/pub/data/gtopo30/global/
terrain  data 
december 2008 by aries1988

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