How do I thin out the vertices for imported contours or other linestrings?

Jacquelyn Pettus — Wed, 15 Oct 2014 18:03:55 GMT

Current Revision posted to OpenRoads | OpenSite Wiki by Jacquelyn Pettus on 10/15/2014 6:03:55 PM

Product(s):	InRoads, MX, GEOPAK
Version(s):	08.11.09+
Area:	Terrain Model
Original Author:	Jacquelyn Pettus, Bentley Technical Support Group

Problem:

I have imported contours graphically into my terrain model. However, there are numerous vertices/linestrings in each contour.

As a result, the density of triangles is high, the terrain model becomes very large, and processing times are increased.

Solution:

The solution for this is not enabled by default and requires the addition of two configuration variables:

CIVIL_DTM_LINESTRING_FILTER_TOLERANCE
CIVIL_DTM_LINESTRING_FILTER_MAXGAP

The Filter Tolerance represents the distance left and right of the chord that you wish to check within. The Filter Max Gap represents the horizontal length that you wish to check within. If a point falls within either tolerance, it will be ignored for triangulation.

The image below represents the same contour above with linestring thinning applied:

How do I thin out the vertices for imported contours or other linestrings?

Beebe Ray — Thu, 17 Jul 2014 17:51:34 GMT

Revision 3 posted to OpenRoads | OpenSite Wiki by Beebe Ray on 7/17/2014 5:51:34 PM


	Applies To

	Product(s):	InRoads, GEOPAK, MX
	Version(s):	08.11.09.674
	Area:	Terrain Modeling
	Original Author:	Jacquelyn Pettus, Bentley Technical Support Group

Question:

I have imported contours graphically into my terrain model. However, there are numerous vertices/linestrings in each contour.

As a result, the density of triangles is high, the terrain model becomes very large, and processing times are increased.

Answer:

The solution for this is not enabled by default and requires the addition of two configuration variables:

CIVIL_DTM_LINESTRING_FILTER_TOLERANCE
CIVIL_DTM_LINESTRING_FILTER_MAXGAP

The image below represents the same contour above with linestring thinning applied:

How do I thin out the vertices for imported contours or other linestrings?

Jacquelyn Pettus — Wed, 28 May 2014 18:43:32 GMT

Revision 2 posted to OpenRoads | OpenSite Wiki by Jacquelyn Pettus on 5/28/2014 6:43:32 PM


	Applies To

	Product(s):	InRoads, GEOPAK, MX
	Version(s):	08.11.09.674
	Area:	Terrain Modeling
	Original Author:	Jacquelyn Pettus, Bentley Technical Support Group

Question:

I have imported contours graphically into my terrain model. However, there are numerous vertices/linestrings in each contour.

As a result, the density of triangles is high, the terrain model becomes very large, and processing times are increased.

Answer:

The solution for this is not enabled by default and requires the addition of two configuration variables:

CIVIL_DTM_LINESTRING_FILTER_TOLERANCE
CIVIL_DTM_LINESTRING_FILTER_MAXGAP

The image below represents the same contour above with linestring thinning applied:

How do I thin out the vertices for imported contours or other linestrings?

Jacquelyn Pettus — Wed, 28 May 2014 16:20:05 GMT

Revision 1 posted to OpenRoads | OpenSite Wiki by Jacquelyn Pettus on 5/28/2014 4:20:05 PM


	Applies To

	Product(s):	InRoads, GEOPAK, MX
	Version(s):	08.11.09.674
	Area:	Terrain Modeling
	Original Author:	Jacquelyn Pettus, Bentley Technical Support Group

Question:

I have imported contours graphically into my terrain model. However, there are numerous vertices/linestrings in each contour.

As a result, the density of triangles is high, the terrain model becomes very large, and processing times are decreased.

Answer:

The solution for this is not enabled by default and requires the addition of two configuration variables:

CIVIL_DTM_LINESTRING_FILTER_TOLERANCE
CIVIL_DTM_LINESTRING_FILTER_MAXGAP

The image below represents the same contour above with linestring thinning applied: