Is there no better option than a DEM from to be used in ? In our field, we are seeing displacements in the mm year and more. Along coastal stretches of Califonia, Oregon, Washington, and other areas radar data from ALOS2 — can exhibit these rates and more ….
Copenicus 10M is a bit better no? How do I avoid this distortion? Could you help me on this? Here are some options for you. For crops, it really depends on the time of season, stage of growth and types of crops for any NDVI analysis.
Nice list, thanks for featuring OpenTopography. But do not know where I can download. Hi-does anyone here have a suggestion of software I can use to help bring out deep details in mountainous terrain? Thanx for the list. Its called DEM1. I like it so far in use with the Mapping-App OruxMaps. Thanks for nice overview! However, I just discovered a serious mistake.. WorldDEM is the future. Your email address will not be published.
Skip to content. Sure you do. Subscribe to our newsletter:. Thanks, and any advice on this would be greatly appreciated. Thanks for the links! Hey, which source has latest DEM for Europe? I have tried USGS and the acquisition date is Martin Gamache has since produced some detailed analysis of the data offered here by the CSI, concluding that the hole-filling algorithm is quite successful in representing broad-scale patterns in topography in data holes.
CIAT have processed this data to provide seamless continuous topography surfaces. Areas with regions of no data in the original SRTM data have been filled using interpolation methods described by Reuter et al. Users should acknowledge CIAT as the source used in the creation of any reports, publications, new datasets, derived products, or services resulting from the use of this dataset. CIAT also request reprints of any publications and notification of any redistributing efforts.
For commercial access to the data, send requests to Andy Jarvis. CIAT shall not be liable for incidental, consequential, or special damages arising out of the use of any data. Nelson, A. Recently published studies that used our SRTM data let us know if we missed yours!
You must be logged in to post a comment. Skip to content Search for: Search Close. Close Menu. The SRTM digital elevation data, produced by NASA originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions of the tropics and other areas of the developing world. Processing was made on a void by void basis. In cases when a higher resolution auxiliary DEM was available, a point coverage is produced of the elevation values at the center of each cell of the auxiliary DEM within void areas.
This process interpolates through the no-data holes, producing a smooth elevational surface where no data was originally found. For areas without a high-resolution auxiliary DEM: The most appropriate interpolation technique is selected based on void size and landform typology, and applied on the data immediately surrounding the hole, using SRTM30 derived points inside the hole should it be of a certain size or greater.
The best interpolations methods can be generalised as Kriging or Inverse Distance Weighting interpolation for small and medium-size voids in relatively flat low-lying areas; Spline interpolation for small and medium-sized voids in high altitude and dissected terrain; Triangular Irregular Network or Inverse Distance Weighting interpolation for large voids in very flat areas, and an advanced Spline Method ANUDEM for large voids in other terrains. The interpolated DEM for the no-data regions is then merged with the original DEM to provide continuous elevational surfaces without no-data regions.
This entire process is performed for tiles with the large overlap with neighboring tiles, thus ensuring seamless and smooth transitions in topography in large void areas. We would like to thank the colleagues in the Land Management and Natural Hazards Unit and the Global Environmental Monitoring unit for their support to provide this data.
Citation Jarvis, A. Reuter, A. Nelson, E. Version History Change from Version 3 to Version 4 Version 4 uses a number of interpolations techniques, described by Reuter et al.
Version 2 has the shorelines clipped.
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