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Grouping polygons in cheetah3d
Grouping polygons in cheetah3d




grouping polygons in cheetah3d
  1. #GROUPING POLYGONS IN CHEETAH3D FOR MAC OS#
  2. #GROUPING POLYGONS IN CHEETAH3D SERIAL#
  3. #GROUPING POLYGONS IN CHEETAH3D FREE#

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grouping polygons in cheetah3d

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#GROUPING POLYGONS IN CHEETAH3D FOR MAC OS#

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#GROUPING POLYGONS IN CHEETAH3D SERIAL#

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#GROUPING POLYGONS IN CHEETAH3D FREE#

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grouping polygons in cheetah3d

P5=Polygon()ĭf = gpd.GeoDataFrame(geometry=)Ĭoords = df.as_matrix(columns=)ĭbscan = DBSCAN(eps=EPS_DISTANCE, min_samples=MIN_SAMPLE_POLYGONS) # * large enough to cluster polygons in one island in same cluster # * smaller than the gap between any two islands # Note, EPS_DISTANCE = 20 is a magic number and it needs to be This also works with more than two islands as well. In our case, polygons in one island will be clustered in same cluster. If the gap between each groups are reasonably big, another option is to cluster the centroid of polygons and label them as clusters.ĭBSCAN stands for Density-Based Spatial Clustering of Applications with Noise and it can group points that are closely packed together. Is this indeed the best / most efficient way to do this? > SepIslands=SepIslands.index+1ģ) Spatial join the islands to the original polygons, so each polygon has the appropriate island id. > SepIslands=gpd.GeoDataFrame(geometry=list(df.unary_union))Ģ) Create an ID for each group. This gives me two polygons, one for each "island". I do the following:ġ) Create a GeoDataFrame with a geometry equal to polygons within the multipolygon unary union. I have developed a way to do this, but I'm wondering if it's the best / most efficient way. For example the 3 polygons on the bottom left can have IslandID = 1 and the 3 polygons on the top right can have an IslandID=2. I want the polygons within each island to take on an ID (can be arbitrary) representing it's group. My data could look something like this: > p1=Polygon() Let's say I have two disjoint groups / "islands" of polygons (think census tracts in two non-adjacent counties).






Grouping polygons in cheetah3d