All Questions
Tagged with topology intersection
14 questions
3
votes
1
answer
95
views
Finding intersection errors based on attribute value using ArcGIS Desktop
I have a road network table in a PostgreSQL database. The table has a level attribute which marks if a road is on the surface or if it is an under- or overpass. I would like to check the topology of ...
- 645
0
votes
0
answers
29
views
Setting topology rules to connect short lines aross complex intersections
I have a polyline SHP with a bunch of very short lines (less than one meter length).
Is there an automated way to force the short lines to connect to a neighboring line at complex intersections?
...
- 950
1
vote
0
answers
456
views
How to delete vertex and keep topology
I work with line vector data (road network).The lines (roads) includes several vertexes. I would like to have for each line only nodes - at the end of line, or at the intersection of n lines. How can ...
- 49
1
vote
0
answers
265
views
Identify intersections and assign them to one of the features in a single layer
I have a single SHP-layer (12,810 features) and want first of all to identify intersections (incl. duplicates --> features with identical geometries). In the next step I want to delete/clip these ...
- 607
4
votes
0
answers
1k
views
TopologyException issue when doing intersection in GeoPandas
When I do overlay processes like intersection, I mostly get:
:TopologyException: found non-noded intersection between LINESTRING
(229971 4.39944e+06, 229971 4.39944e+06) and LINESTRING (229971
4....
- 59
3
votes
1
answer
677
views
Unexpected result for the Intersection of touching polygons
I have two touching Polygons (two neighbouring counties) and there intersection is a MultiLineString, where:
len(list(counties["King's Co."].intersection(counties["Queen's Co."])....
- 87
3
votes
1
answer
264
views
Snap lines to polygon verticies at interscetion
I'm trying to figure out a way to snap lines to a polygon layer, but only at the intersecting point. Here is a sample picture of what I'm working with. I have a layer of polygons and a line string ...
- 255
1
vote
1
answer
83
views
How to find points present in one layer but not in a second layer, using ArcGIS?
I have two layers, A and B, with B consisting of a proper subset of the points in A. How can I produce a third layer, C, consisting of just those points found in A but not in B.
In R, I would just ...
- 947
1
vote
0
answers
918
views
How to simplify a self intersected / self overlapped polyline using ArcObjects?
I have a self intersected polyline, how can I break it into 5 records stored in the same table using arcobjects? (splited by vertices and the intersection point)
Here is what I have got and it doesn'...
- 33
3
votes
1
answer
764
views
Verifying the number of times a line crosses other lines
I have a series of lines that represent streams. I have a stream line and two flowpath lines in one feature class and two banklines in another feature class. Total of five lines. I then have a feature ...
- 31
2
votes
2
answers
2k
views
How to check if vertex exists (on polyline) based on location of point layer using ArcPy?
Using ArcGIS for Desktop Advanced 10.1 (with all extensions)
I am building a centerline network that will be used by a MapObjects program to do routing based on "turns at any vertex" (as opposed to ...
- 1,460
1
vote
0
answers
1k
views
How to handle/ avoid intersect errors when clipping the difference between two layers?
Using QGIS + Grass, I've added a shapefile of coastline and islands to my map.
I then buffer this shapefile to create a coastal zone of a known width. At this stage the buffer consists of the ...
- 497
9
votes
2
answers
17k
views
How to repair topology of a shapefile?
I performed an object-based image analysis using ENVI EX, and each of the classified features were exported as a shapefile. I transferred those shapefiles into ArcMap 10, and tried to intersect them ...
- 981
4
votes
1
answer
3k
views
Intersecting two polylines using ArcObjects?
I have two polylines and would like to find the intersection(s) using ArcObjects / VB.NET.
I'm using the following code:
Dim topoOp As ITopologicalOperator = TryCast(pTestPoly2, ITopologicalOperator)...
- 792