All Questions
14 questions
1
vote
1
answer
205
views
Holes after topology simplification
After applying the topology simplification mentioned in the answer
Remove Slivers/Gaps generated after TopologyPreserveSimplification?
It is retaining the topology but is removing the polygon. Below ...
- 103
0
votes
0
answers
23
views
Polygon boundary not adjacent after simplification [duplicate]
I am simplifying set of polygons that are adjacent. I used topologypreserveSimplifier which simplify each polygon separately the issue is the resulting polygons are not adjacent anymore.
After ...
- 103
0
votes
1
answer
107
views
Simplify OS MasterMap Data without Losing Key Details
I am building a flood model (Infoworks ICM), using OS MasterMap Topography data supplied in shapefile format to define land use such as roads, buildings, fields etc across the river's catchment. The ...
- 671
1
vote
0
answers
89
views
Output Error from SimpliPy in QGIS
I am trying to simplify a polygon layer of parliamentary constituencies in Kenya using SimplyPy in QGIS and appear to be getting an erroneous result.
The method is working for most of the polygons ...
- 531
1
vote
0
answers
241
views
Is it possible to simplify geometry only for polygons with certain attributes?
I have a map of electoral districts. Urban areas have more densely packed districts whose borders are more important to keep at high resolution. More rural districts have simpler geometries and have ...
- 149
10
votes
1
answer
3k
views
Cleaning large Shapefile using v.clean in order to dissolve features?
I'm having real problems cleaning up and reducing the size of a Shapefile which is published by the UK's Environment Agency.
It shows the extents of the LiDAR open data they publish: each polygon is ...
- 305
1
vote
0
answers
647
views
Simplifying boundaries of divisions of country using QGIS?
I am trying to create a map to show all the divisions of a country (regions, departments), but the original map (one SHP file), with a lot of detail in the boundaries, is 5-Mb sized.
I'd like to ...
- 361
2
votes
0
answers
586
views
Filtering Small Areas of Shapefiles Using R
I'm trying to use the method proposed by the @ialm in the Question "How to speed up the plotting of polygons in R?"
There, he loads the maps using getData from the raster package, I tested and it ...
- 121
-4
votes
1
answer
318
views
Simplify shapefiles [closed]
I've shapefiles with me and I want to de-code those file and want to build a custom map. Could someone let me know how can I do that with out using Python code.
13
votes
2
answers
21k
views
writeOGR with a spatialpolygon simplified by gSimplify
I'm using gSimplify (rgeos package) to simplify the geometries of a shapefile. The funcion works good, but now I can't write the output in a new shapefile.
I tried some ways:
writeOGR(simplyshape, ...
- 419
8
votes
2
answers
695
views
Complex Shapefile Compression Advice
I'm looking for some advice on how I can simplify this very detailed shapefile to ultimately be used for the web (as topojson) as a interactive heatmap. It was originally created from a raster file (...
- 253
3
votes
0
answers
273
views
How to simplify polygon shapefile and maintain topology? [duplicate]
I'm looking for a straightforward answer that actually works...not a 'duplicate question' flag. None of the other solutions posted in similar threads actually work...they all have dead-end answers and/...
- 151
3
votes
0
answers
106
views
Reduce level of detail for vector contour lines [duplicate]
Possible Duplicate:
Simplify Raster Contours ArcGIS 10
I have quite a huge shapefile storing vector contour lines: 1GB. I want to create a detailed heightmap for further 3D usage but the level of ...
- 131
3
votes
3
answers
4k
views
Simplifying Shapefile using ArcGIS Desktop or alternative?
I have a shapefile that contains neighborhood boundaries that I want to simplify. Right now I am thinking of converting the shapefile to Google maps KML so I can insert the boundaries into the map as ...
- 1,695