Extract Raster DEM

Pascal Cloutier — Thu, 19 Mar 2020 12:26:36 GMT

Current Revision posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Pascal Cloutier on 3/19/2020 12:26:36 PM

The extract raster DEM functionality allows the user to create a raster DEM (i.e. : an image whose pixels contain elevation data) from a region of a Scalable Terrain Model (i.e. : STM).

Here is a short video showing the extraction of a raster DEM and the attachment of the generated raster DEM in Raster Manager.

communities.bentley.com/.../RasterDEMExtraction.mp4

Usability tip : As the video shows, the region of the STM from which the raster DEM need to be extracted cannot be too large. So using a more precise region (e.g. : road corridor, terrain not rectangular) will optimize the chance of being able to extract the contours for the desired region in one pass.

File formats

The extract raster DEM functionality supports a few different file formats for storing the DEM information.

Internet TIFF
Internet TIFF 64 bits
Erdas IMG
TIFF
GeoTIFF

Performance Tip : Use the Internet TIFF file format for best performance and interoperability with MicroStation`s Raster Manager,

There are also two pixel types that are available for storing DEM elevation in the raster DEM.

16 bits signed integer number
32 bits floating point number

Precision Tip : Use the 32 bits floating point number for increase precision and if you want to keep the digit after the decimal (e.g. : centimeter precision).

For pixel whose center doesn`t overlap any terrain data (i.e. : outside the boundary of the STM) the no data pixel value (i.e. : the pixel value used by default) is -32767.

The vertical unit of the DEM raster is the same as the vertical unit of the STM.

Tags: Extract Raster DEM

Extract Raster DEM

Jesse Dringoli — Wed, 09 Mar 2016 20:34:19 GMT

Revision 4 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Jesse Dringoli on 3/9/2016 8:34:19 PM

The extract raster DEM functionality allows the user to create a raster DEM (i.e. : an image whose pixels contain elevation data) from a region of a Scalable Terrain Model (i.e. : STM).

Here is a short video showing the extraction of a raster DEM and the attachment of the generated raster DEM in Raster Manager.

communities.bentley.com/.../RasterDEMExtraction.mp4

File formats

The extract raster DEM functionality supports a few different file formats for storing the DEM information.

Internet TIFF
Internet TIFF 64 bits
Erdas IMG
TIFF
GeoTIFF

Performance Tip : Use the Internet TIFF file format for best performance and interoperability with MicroStation`s Raster Manager,

There are also two pixel types that are available for storing DEM elevation in the raster DEM.

16 bits signed integer number
32 bits floating point number

Precision Tip : Use the 32 bits floating point number for increase precision and if you want to keep the digit after the decimal (e.g. : centimeter precision).

For pixel whose center doesn`t overlap any terrain data (i.e. : outside the boundary of the STM) the no data pixel value (i.e. : the pixel value used by default) is -32767.

The vertical unit of the DEM raster is the same as the vertical unit of the STM.

Tags: Extract Raster DEM

Extract Raster DEM

Mathieu St-pierre — Sat, 07 Dec 2013 14:21:22 GMT

Revision 3 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Mathieu St-pierre on 12/7/2013 2:21:22 PM

The extract raster DEM functionality allows the user to create a raster DEM (i.e. : an image whose pixels contain elevation data) from a region of a Scalable Terrain Model (i.e. : STM).

Here is a short video showing the extraction of a raster DEM and the attachment of the generated raster DEM in Raster Manager.

communities.bentley.com/.../RasterDEMExtraction.wmv

File formats

The extract raster DEM functionality supports a few different file formats for storing the DEM information.

Internet TIFF
Internet TIFF 64 bits
Erdas IMG
TIFF
GeoTIFF

Performance Tip : Use the Internet TIFF file format for best performance and interoperability with MicroStation`s Raster Manager,

There are also two pixel types that are available for storing DEM elevation in the raster DEM.

16 bits signed integer number
32 bits floating point number

Precision Tip : Use the 32 bits floating point number for increase precision and if you want to keep the digit after the decimal (e.g. : centimeter precision).

For pixel whose center doesn`t overlap any terrain data (i.e. : outside the boundary of the STM) the no data pixel value (i.e. : the pixel value used by default) is -32767.

The vertical unit of the DEM raster is the same as the vertical unit of the STM.

Tags: Extract Raster DEM

Extract Raster DEM

Mathieu St-pierre — Sat, 07 Dec 2013 14:02:58 GMT

Revision 2 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Mathieu St-pierre on 12/7/2013 2:02:58 PM

The extract raster DEM functionality allows the user to create a raster DEM (i.e. : an image whose pixels contain elevation data) from a region of a Scalable Terrain Model (i.e. : STM).

File formats

The extract raster DEM functionality supports a few different file formats for storing the DEM information.

Internet TIFF
Internet TIFF 64 bits
Erdas IMG
TIFF
GeoTIFF

Performance Tip : Use the Internet TIFF file format for best performance and interoperability with MicroStation`s Raster Manager,

There are also two pixel types that are available for storing DEM elevation in the raster DEM.

16 bits signed integer number
32 bits floating point number

Precision Tip : Use the 32 bits floating point number for increase precision and if you want to keep the digit after the decimal (e.g. : centimeter precision).

Tags: Extract Raster DEM

Extract Raster DEM

Mathieu St-pierre — Sat, 07 Dec 2013 13:42:01 GMT

Revision 1 posted to ContextCapture | Descartes | Pointools | Orbit Wiki by Mathieu St-pierre on 12/7/2013 1:42:01 PM

The extract raster DEM functionality allows the user to create a raster DEM (i.e. : an image whose pixels contain elevation data) from a region of a Scalable Terrain Model (i.e. : STM).

Tags: Extract Raster DEM