geo.be Metadata Catalog
Digital terrain model
Simple
- Date (Publication)
- 2007-01-01
- Date (Revision)
- 2022-04-15
- Identifier
- BE.NGI-IGN / 5B217883-3BE6-4626-9B3B-2C1AD391DCA0
- Purpose
- The National Geographic Intitute uses the DTM primarily as a reference surface for applications at the scale of 1:10 000. It is also used for the internal production of orthophotographs. As a product, it is destined for customers who need a terrain model, wherever in Belgium, with a resolution of 1:10 000 at scale level. As an interpolation of the ground surface, the DTM has a heterogeneous accuracy, which can decline, especially in areas where few or no altimetric data are available.
- Status
- Completed
- Maintenance and update frequency
- As needed
- Use limitation
- •The custodian of the resource holds the rights of property (including the rights of intellectual property) to the geographic files •The custodian grants the user the right to use the data for his internal use. •Commercial use of the data under any form is strictly forbidden •Custodian’s name must be mentioned each time the data are being used publically.
- Access constraints
- Other restrictions
- Other constraints
- No limitations on public access
- Use constraints
- Other restrictions
- Other constraints
- •The custodian of the resource holds the rights of property (including the rights of intellectual property) to the geographic files •The custodian grants the user the right to use the data for his internal use. •Commercial use of the data under any form is strictly forbidden •Custodian’s name must be mentioned each time the data are being used publically.
- Spatial representation type
- Grid
- Distance
- 20 m
- Distance
- 5 m
- Distance
- 1 m
- Metadata language
- Nederlands; Vlaams
- Character set
- 8859 Part 15
- Topic category
-
- Elevation
- Description
- Belgium
))
- Unique resource identifier
- EPSG:3812
- Codespace
- EPSG
- Unique resource identifier
- EPSG:5710
- Codespace
- EPSG
Spatial representation info
- Distribution format
-
-
TIFF
(
)
-
Esri Geodatabase
()
-
TIFF
(
)
- OnLine resource
- https://ac.ngi.be/remoteclient-open/GeoBePartners-open/ATOM/6657e6da-7345-416f-bef6-c6a8b2def9bd-en.xml ( ATOM )
- OnLine resource
-
Downloadable data
(
WWW:DOWNLOAD-1.0-http--download
)
Downloadable data
- OnLine resource
-
View service
(
OGC:WMS
)
View service
- OnLine resource
-
https://www.ngi.be/website/aanbod/digitale-geodata/digitaal-terrein-model/
(
WWW:LINK-1.0-http--link
)
Direct access to the webshop
- Hierarchy level
- Dataset
- Dataset
- DTM
Domain consistency
- Name of measure
- INSPIRE Conformity
Conformance result
- Date (Publication)
- 2010-12-08
- Explanation
- The dataset described fills the technical requirements sustaining the interoperability of data sets and services, as stipulated in the Commission Regulation (EU) No 1089/2010 of 23 November 2010
- Pass
- Yes
- Statement
-
The product 'DTM', gives the height of the ground level in relation to the Belgian zero level (fictitious zero D of Uccle). It is therefore the orthometric height, commonly called: altitude.
The source data used for the production of this DTM are the 1m resolution DTMs of the regions: those of the AIV (ex-AGIV), for the Flemish region, and those of the SPW, for the Walloon region.
The two regional organisations providing their product in Lambert 72, the IGN reprojected the data into Lambert 2008 and carried out an interpolation in order to obtain a product with round coordinates and then assembled them so that the DTM product thus created covers the entire Belgian territory.
These source data are collected and processed to obtain a homogeneous and regular grid with every 1m, in X and Y, a point that indicates the height of the ground level. This grid forms the DTM 1m product, i.e. the DTM at 1 metre resolution. This product is directly derived from regional data and is not updated.
The 1m DTM is resampled by bilinear interpolation to obtain the same type of grid at 5m resolution. This is also improved and updated in-house via direct photogrammetric surveys of points and lines of structures based on the most recent aerial photography to produce the 5m DTM product. The DTM 5m is based on a compilation of the best available data, which is continuously updated and improved.
The 20m DTM product is then obtained by resampling the 1m DTM by bilinear interpolation to obtain a grid with a resolution of 20m.
- Description
- Each time new source data become available, they are incorporated into the existing source data and checked. On the basis of these new source data, a new version of the DTM is derived.
- Description
- The different sources which have been used are: image correlation, direct photogrammetric measurement of points and structure lines on the basis of aerial photographs, airborne laser scanning (points), field surveys (points), sometimes completed with linear structures, digitalized, updated and sometimes completed with structure lines.
- File identifier
- 6657e6da-7345-416f-bef6-c6a8b2def9bd XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2022-11-28T17:11:01
- Metadata standard name
- ISO 19115:2003/19139
- Metadata standard version
- 1.0
Overviews
Spatial extent
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