SRTM DEM

EarthEnv-DEM90

Short title: 
EarthEnv-DEM90

EarthEnv-DEM90: 90 m resolution digital elevation model from fused ASTER and SRTM data is available for download from: http://www.earthenv.org/DEM

Available layers: 

smoothed elevation

Grid definition: 

100 m resolution global

proj4: 
+proj=longlat +datum=WGS84
Lineage: 

The data distributed here are in EHdr format, unprojected and referenced to the WGS84 geodetic datum. They are derived from CGIAR-CSI SRTM v4.1 and ASTER GDEM v2 data products. These data have been processed and merged to provide continuous coverage of ~91% of the globe. Processing and merging methodology are available in Robinson et al. (2014).

Data owner: 
NCEAS, NASA, NSF, and Yale University

MDEM250m

Short title: 
Global (land coverage) DEM at 250 m in the Equi7 system

EQUI7 tiling

Available layers: 

Download land surface model per Equi7 region:


 

Grid definition: 

Projection system: Equi7 grid
Spatial resolution: 250 m
Total size: 3.3 GB
Equi7 tilining system: Equi7t3_shp.zip (6)

proj4: 
+proj=aeqd
Lineage: 

The DEM presented below (projected in equi-distance system hence ready for DEM analysis / flow modelling) was produced as a weighted average between three sources of global DEMs:

The processing steps are explained in detail via the Github repository on WorldGrids. Read more about global DEM data sources: DEM data sources (a review).

Data owner: 
Public

Baranja hill

Short title: 
barhill

The Baranja Hill study area, located in eastern Croatia, has been mapped extensively over the years and several GIS layers are available at various scales. Its main geomorphic features include hill summits and shoulders, eroded slopes of small valleys, valley bottoms, a large abandoned river channel, and river terraces. All raster images are prepared in the ArcInfo ASCI grid format. The vector maps are prepared as shape files. In addition to the GIS layers, you might also need to use the field observations. Courtesy of the Croatian State Geodetic Department.

Location

Baranja hill Popovac
Croatia
45° 48' 16.4412" N, 18° 39' 54.198" E
Available layers: 

- DEM25m - 25 m resolution DEM derived from the 1:5K contours (ArcInfo ASCI grid format);
- contours.shp - Contour lines digitized from the 1:50K topo maps (ESRI Shapefile);
- contours5K.shp - Contour lines digitized from the 1:5K topo maps (ESRI Shapefile);
- wstreams.shp - Streams and water bodies digitized from the 1:50K topo maps (ESRI Shapefile);
- elevations.shp - very precise elevation measurements from 1:5K land survey (ESRI Shapefile);
- DEM25srtm.asc - 25 m resolution DEM from SRTM 2000 project ordered via http://eoweb.dlr.de (ArcInfo ASCI grid format);
- orthophoto.tif - 5 m resolution ortophoto (ArcInfo ASCI grid format);
- topo5K.tif - Topo map 1:5000 (geotif, 23 MB!!!);
- satimage.lan - 25 m resolution Landsat 7 image from September 1999 (ERDAS .lan format);
- landcover.shp - Land cover map digitized from the ortophoto (ESRI Shapefile);
- geoform.shp - Map of the geoforms using the geopedological approach (ESRI Shapefile);

Grid definition: 

ncols: 147
nrows: 149
xllcorner: 6551884
yllcorner: 5070562
cellsize: 25 m

proj4: 
+proj=tmerc +lat_0=0 +lon_0=18 +k=0.9999 +x_0=6500000 +y_0=0 +ellps=bessel +towgs84=550.499,164.116,475.142,5.80967,2.07902,-11.62386,0.99999445824 +units=m
Lineage: 

50K and 5K scale topomaps and aerial photo have been obtained from the Croatian State Geodetic Department (http://www.dgu.hr). Orthorectified photo was produced following the methodology explained in Rossiter & Hengl (2002). From the orthophoto we digitized on-screen land cover polygon map using the following classes: agricultural fields, fish ponds, natural forest, pasture and grassland, and urban areas. From the stereo-pairs we interpreted the generic landforms and then created a polygon map of geoforms (see also Rossiter & Hengl (2002)). Nine landform elements were recognised: summit, hill shoulder, escarpment, colluvium, hillslope, valley bottom, glacis (sloping), high terrace (tread) and low terrace (tread). From topomaps, we extracted contours and streams and water bodies. In the case of 1:50K the equidistance was 20 m in hilland and 5 m in plain, and for the 1:5K the equidistance was 5 m in hilland and 1 m in plain. From the 1:5K contours and geodetic points, the 5 m DEM has been derived using the ANUDEM (topogrid) procedure in ArcInfo and then resampled to the 25 m gird. The 30 m SRTM DEM (15'x15' block) was ordered from the German Aerospace Agency (http://eoweb.dlr.de), then resampled to the 25 grid so it can be compared with the DEM25m. IMPORTANT NOTE: According to a licence agreement, the SRTM dataset can not be distributed or used for commercial purposes outside this project.

Data owner: 
Croatian State Geodetic Department
Location: 
Baranja hill Popovac
Croatia
45° 48' 16.4412" N, 18° 39' 54.198" E