User:Ikonor/DE:SRTM Alternativen / DGM

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Digitales Geländemodell (DGM/DTM)

Wald und Gebäude rausrechnen

Interpolation

SRTM Radar Penetration

  • "However, given the relatively short operating wavelength of the C-Band sensor (5.6 cm), retrieved elevations over vegetated terrain were not expected to represent “bald earth” surface elevation, but rather the elevations of various scatterers such as leaves and branches. Thus, in vegetated terrain, the DEM’s represent neither the “bald earth” surface nor the canopy top surface, but some elevation between the two."
    Validation of SRTM Elevations Over Vegetated and Non-vegetated Terrain Using Medium Footprint Lidar
  • "Waves in the X-band are reflected off the leaves,while waves in the C-band are reflected off both leaves and branches, and, depending upon the conditions, they are also reflected off the tree trunks and the ground."
    Detailed Description of SRTM Observation Principles
  • "Did the radar sample the tops of trees or the ground level?
    The radar does not "see" through thick vegetation canopies. It probably penetrated a little way into some canopies, but in general it followed near the top of the canopy."
    FAQ, SRTM Radar Penetration

DEMs

Weltweit

Deutschland

Open Data

Beispiel Kommerziell

Nachbarländer

siehe auch LiDAR

​​LiDAR

Regionale, hochauflösende Höhendaten aus Laserscans zum Vergleich

Linksammlungen

Tools

Sonstiges (closed source/data)

Höhenfestpunkte

Wikipedia, Altitude

Kombiniert

  • (ESRI ArcGIS Terrain - nicht offen!) - siehe "Data Sources" mit Links zu Quellen (nicht unbedingt offen!?)

Links

Vergleich

Analyse - Slope, ...

DEM im Browser

Services

Formate

Raster image tiles

ele aus GPX Tracks

OSM

      data    incline error < 3% [%]  covered ways [%]
    OSM GPS            86.3                  37
    SRTM               83.3                 100


GPSies

"3.5 Millionen Strecken" (Quelle) - insgesamt, nicht offen

OSM Uploads User GPSies_com: 20.402 Tracks (nur anonyme Uploads, sonst mit OSM-User), siehe Schon wieder ein Openstreetmap Update: GPSies-Tracks bei Openstreetmap hochladen

Map matching

Barometer