SRTM X-SAR - Elevation Error Mosaic - Global

The SRTM X-SAR Error Mosaic is based on the height error map (HEM, see SRTM PDF http://www.dlr.de/eoc/Portaldata/60/Resources/dokumente/7_sat_miss/SRTM-XSAR-DEM-DTED-1.1.pdf ) and provides a local measure of the achieved accuracy. It is statistically determined from a neighborhood of image cells mainly considering the phase and baseline stability. Thus it describes the precision relative to the surrounding. The determination of the absolute accuracy requires the consideration of reference measures.

Identification

Data identification

Citation

Date (Revision)
2011-01-31T00:22:00
Citation identifier
https://geoservice.dlr.de/catalogue/srv/metadata/6e136303-ff02-4ab4-b38a-db5ef64eea2c
Presentation form
Digital map
Purpose

The purpose of the SRTM X-SAR Error Mosaic is to enable and facilitate access to and visualisation of DLR's SRTM data through standardized web services.
Status
Completed
Point of contact
  German Aerospace Center (DLR)
Maintenance and update frequency
As needed
Theme

  • DLR

  • Elevation

  • Space Shuttle

  • STS-99

  • SRTM

  • X-SAR

  • HEM

  • Global

  • inspireidentifiziert

GEMET - INSPIRE themes, version 1.0

  • Höhe

Legal constraints

Access constraints
Other restrictions
Other constraints
Es gelten keine Zugriffsbeschränkungen

Legal constraints

Use constraints
Other restrictions
Other constraints

Nutzungsbedingungen: https://geoservice.dlr.de/resources/licenses/srtm_xsar/DLR_SRTM_XSAR_ReadMe.pdf / Terms of use: https://geoservice.dlr.de/resources/licenses/srtm_xsar/DLR_SRTM_XSAR_ReadMe.pdf

Use limitation

Nutzungseinschränkungen: Das DLR ist nicht haftbar für Schäden, die sich aus der Nutzung ergeben. / Use Limitations: DLR not liable for damage resulting from use.
Spatial representation type
Grid
Denominator
50000
Language
Deutsch
Character set
UTF8
Topic category
  • Elevation

Extent

N
S
E
W
thumbnail


Begin date
2000-01-11T07:00:00
End date
2000-01-22T08:00:00
 

Distribution

Distribution

Distribution format
  • GeoTIFF ()

Digital transfer options

OnLine resource
DLR SRTM Webpage ( WWW:LINK-1.0-http--link )

Webpage with links and mission descriptions

OnLine resource
srtm_x-sar_hem_mosaic ( OGC:WMS )

WMS access to SRTM X-SAR Mosaic Error

OnLine resource
srtm_x-sar_hem_mosaic ( OGC:WCS )

WCS access to SRTM X-SAR Mosaic Error

OnLine resource
https://geoservice.dlr.de/eoc/elevation/wms?SERVICE=WMS&REQUEST=GetCapabilities ( OGC:WMS-http-get-capabilities )
OnLine resource
https://geoservice.dlr.de/eoc/elevation/wcs?SERVICE=WCS&REQUEST=GetCapabilities ( OGC:WCS-http-get-capabilities )
OnLine resource
EOC Geoservice Map Context ( WWW:LINK-1.0-http--link )

EOC Geoservice Map Context (srtm:x-sar)

 

Quality

Data quality

Hierarchy level
Dataset

Domain consistency

Measure identification
INSPIRE / Conformity_001

Conformance result

Citation

Date (Publication)
2010-12-08
Explanation

See the referenced specification.
Pass
Yes

Lineage

Statement

Horizontal accuracy (absolute): ±20m 90% circular error

Horizontal accuracy (relative): ±15m 90% circular error

Vertical accuracy (absolute): ±16m 90% linear error

Vertical accuracy (relative): ±6m 90% linear error

Process step

Description

Calculation of a list of files that are contained in each 30x30 degree tile of the world grid
Date / Time
2010-01-30T18:00:00

Process step

Description

Merging the files from the list into one GeoTIFF file. The following GDAL v1.7.2 command was used: gdal_merge.py -of GTiff -co TFW=YES -co TILED=YES -init -32767 -n -32767
Date / Time
2010-01-31T09:00:00

Process step

Description

Calculation of the overviews for each GeoTIFF tile. The following GDAL v1.7.2 command was used: gdaladdo -r cubic GEOTIFF_FILE 4 8 16 32 64 128 256 512 1024
Date / Time
2010-01-01T18:00:00
 

Spatial rep.

Grid spatial representation

Number of dimensions
3

Dimension

Dimension name
Row
Dimension size
1598400
Resolution
25  m

Dimension

Dimension name
Column
Dimension size
510600
Resolution
25  m

Dimension

Dimension name
Vertical
Dimension size
1
Resolution
1  m
Cell geometry
Area
Transformation parameter availability
No
 

Ref. system

Unique resource identifier
EPSG:4326
 

Metadata

Metadata

File identifier
6e136303-ff02-4ab4-b38a-db5ef64eea2c XML
Metadata language
Deutsch
Character set
UTF8
Hierarchy level
Dataset
Hierarchy level name

dataset
Date stamp
2024-06-20T14:12:23
Metadata standard name

ISO 19115-1:2014/19139
Metadata standard version

1.0
Point of contact
  German Aerospace Center (DLR)
 
 

Overviews

overview
large_thumbnail
overview
thumbnail

Spatial extent

N
S
E
W
thumbnail


Keywords

DLR Elevation Global HEM SRTM STS-99 Space Shuttle X-SAR inspireidentifiziert
GEMET - INSPIRE themes, version 1.0
Höhe

Provided by

Access to the portal

Associated resources

Not available