Back

Zlatibor

The case study area  ‘Zlatibor’ is located in the South-western part of Serbia (centred at 43°43’44.6”N and 19°42’37.8”E). The area is mainly hilly plateau, with the exception of the north-east part where the slopes are much steeper. Elevations range from 850 m to a maximum of 1174 m; the total size of the area is 13.5 square kilometers.

Fig: Study area Zlatibor: (a) perspective view on the area (1:25,000 topo-map) and location of 1020 error assessment points, (b) a preview of the auxiliary predictors used for the geostatistical modeling.

Available layers: 

– elevations.txt — a set of 2051 height measurements used for generation of DEMs;
– control.txt — a set of 1020 very precise spot heights used for error assessment;
– dem30.asc — the original topo-map DEM at 30 m resolution;
– SRTMDEM.asc — 3 arcsec (90 m) SRTM DEM;

Grid definition

ncols: 150
nrows: 100
xllcorner: 7394249
yllcorner: 4841999
cellsize: 30 m

proj4:  +proj=tmerc +lat_0=0 +lon_0=21 +k=0.9999 +x_0=7500000 +y_0=0 +ellps=bessel +towgs84=574.027,170.175,401.545,4.88786,-0.66524,-13.24673,0.99999311067 +units=m

Lineage

The original topo-map DEM was produced by digitizing contour layers from two adjacent sheets of the 1:5000 topographic maps with contour interval of 5 m. Two sheets were scanned by ANATech Evolution scanner with 400 DPI resolution, then georeferenced to the Gauss-Krüger coordinate system (7th zone) and converted to a point map using a semi-automated digitalization of contour lines (I/GEOVEC, Intergraph program module). The faults obtained during automated digitalization were removed by 3D editing of contour lines. The final DEM was produced using the ArcGIS 3D analyst: first a TIN was produced, which was then converted to a regular grid of 30~m resolution. This will be referred to as the topo-DEM in further text. The original points extracted from the topo-map (51,847 points) were sub-sampled (for computational efficiency) to 2051 points.

A set of 1020 photogrammetric control points was provided with the help of the Geodetic governmental authority of Serbia. These were obtained throughout the orthophoto map production of the scale 1:1000 for local municipality. Aerial images were obtained using the RMK 21/23 analog camera with calibrated focal length f=207.96 mm. The average flying altitude was 1040 m. A stereoscopic model was produced using the WILD A10 analog stereo-restitution instrument and MapSoft2000 program package. The land-surface points were measured manually from the stereoscopic model with average lag of 15 m. This gave a total number of 46,021 points that were sub-sampled to 1020 points for faster processing. The estimated height accuracy of control points is 15 cm which allows us to use it as ground truth for the topo-DEM.

Data owner:  Geodetic governmental authority of Serbia
Reference:  {Geostatistical modelling of topography using auxiliary maps}
Location: Zlatibor Zlatibor, Serbia
43° 43′ 0.0012″ N, 19° 41′ 60″ E


Attachment:

 705 total views,  2 views today

  • "International Society for Geomorphometry (ISG) is a non-commercial, nongovernmental association of researchers and experts that are open for free exchange of knowledge and opinions about various aspects of DEM processing and Digital Terrain Modeling."

We use cookies to give you the best experience. Disclaimer