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Questions tagged [tesselation]

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2
votes
2answers
46 views

Generate Tessellations looping through all shapefiles from folder in ArcGIS Pro ModelBuilder?

I am trying to create Hexagonal grids for each shapefile in a folder. I opted for ArcGIS Pro ModelBuilder tool and was successful in creating a loop that reads and loads shapefile in the memory. But ...
7
votes
1answer
128 views

Optimal tiling of polygon using ArcGIS Desktop?

I am trying to tile a polygon with a minimal number of fixed sized squares. Currently I am creating a fishnet over my polygon then spatially joining the squares that intersect the polygon. This is ...
3
votes
0answers
49 views

Apollonius Graphs (Delaunay Graphs of Disks) in sfcgal or PostGIS?

I was wondering if there is support for Delaunay Graphs of Disks (a.k.a. Apollonius Graphs) in PostGIS/sfcgal? A CGAL function seems to exist for this. But I can't seem to find it in the PostGIS ...
0
votes
0answers
44 views

Creating regular grid cells (square) by ArcGIS Desktop through geographic coordinate system?

I need to create grid cells (square =1000*1000 meter or 500*500 meter) by ArcGIS through the geographic coordinate system. It worth to be noted that the latitude coordinates between 22~23 degree.
1
vote
1answer
77 views

Generate a grid through an extensive area without killing my machine

I need to generate a grid of 10x10m on a certain extent so I can extract only the squares that have some area inside of a certain shape. My problem is that the shape I need to extract those squares ...
1
vote
1answer
25 views

Merging tesselating regions depending on size?

I have the following regions marked up over map Each region has assicated statistical data. The problem is that sizes of these regions are very different. Some regions are very big and another ones ...
1
vote
1answer
395 views

Generate Tessellation & Centroids using ArcGIS Pro?

I first generated a square tessellation (using Generate Tesselation) using the following: arcpy.GenerateTessellation_management(Output_Feature_Class="/File Location Removed", Extent="371935.1483 ...
2
votes
1answer
574 views

Converting TIN to Multipolygon in PostGIS?

ST_Tesselate returns TIN geometry. But then I need to use other software to process geometry data and it only accept (multi-)linestrings and (multi-)polygons. Is there way to convert TIN triangles ...
0
votes
1answer
2k views

Make a shapefile with geopandas from polygons

I am new in dealing with shapefiles. I have a dataset with points that represent centroids of polygons. I want to do a Voronoi tessellation and create a new shapefile with the obtained polygons ...
3
votes
1answer
683 views

Create history map with inkscape with each country as a distinct object

I want to create history maps (maps showing historical borders) with inkscape and to have an object for each country. I want to draw borders between countries only once and have this part of a path ...
9
votes
1answer
295 views

Cutting out the world into polygons of equal population size

I would like to cut out the world into polygons of equal population size, say 100 million persons (starting for example with raster data of population density as provided by the NASA). I know that ...
8
votes
1answer
966 views

Is there Open Source equivalent to ArcGIS Integrate (for topology correction)?

I need to transform a set of polygons so that it forms an exact spatial partition/tesselation (no gap - no overlap). What are the existing open-source solutions (software or library) to perform this ...