Fill DEM Holes, Voids or Gaps using ArcGIS / Koreksi dan perbaikan DEM di ArcGIS
Gaps, Hole, or Void problems in a DEM could give some pain in the head for GIS users. gaps will cause the derivated data extracted from a DEM to mess up. Hillshade will lose the color grades, contour line will be jagged and causing a huge amount of wrongly generated lines (makes the filesize raised up exponentially too), slope or aspect data are not accurately mapped, and many others. Gaps could arise due to the limitation of certain DEM extraction methods, or it happens because of the poor handling of DEM mosaicking. Certain DEM extraction methods like photogrammetric DEM extraction, UAV-based DEM, or interferometric DEM are prone to this gap or voids problem. DEM mosaicking from few sources of DEM that have different map projection is also prone to gaps/voids problem. Fortunately, many GIS and RS software have provided tools dedicated to fix and correct these holes/gaps problem. DEM editing can be done manually using masking approach or pixel-by-pixel editing, or it could ...