polygon Questions
2
Solved
So I want to merge adjacent polygons in javascript this is what I actually have with my code:
I want to remove inside stroke but keep border stroke.
So I want to go from this:
To this:
I want to...
3
Solved
I'm working on implementing various subdivision algorithms (such as catmull-clark); to do this efficiently requires a good way to store information about a grid of tesselated polygons. I implemente...
Bilbe asked 12/3, 2013 at 15:35
10
Solved
How do you get/extract the points that define a shapely polygon?
Thanks!
Example of a shapely polygon
from shapely.geometry import Polygon
# Create polygon from lists of points
x = [list of x va...
4
Solved
Given a polygon (not necessary convex) in the Cartesian coordinate, i wonder if there are any way to check the symmetricalness of that polygon?
I can think of an O(N) solution: using rotating cali...
Backspace asked 4/5, 2011 at 9:1
5
If I have a vector (a line consisting of 2 points) on a 2D plane how can I determine if it has passed through a polygon?
I know I can take each line which makes up the polygon and see if any inters...
3
I'm trying to execute a simple st_intersects query:
select st_intersects('MULTIPOLYGON(((1 5,4 8,7 5,4 2,1 5)),((5 5,8 8,11 5,8 2,5 5)))','POLYGON((3 4.5,3 5,4 5,4 4,3 4.5))');
which crush the c...
Oddson asked 6/3, 2017 at 13:45
11
From the man page for XFillPolygon:
If shape is Complex, the path may self-intersect. Note that contiguous coincident points in the path are not treated as self-intersection.
If shape is Conv...
Shorter asked 23/1, 2009 at 5:16
3
I have a shapefile with several contiguous polygons and I want to reduce their number of nodes keeping the adjacent polygons topologically consistent.
I was thinking of deleting nodes based on the...
Lienlienhard asked 1/2, 2018 at 12:24
7
Solved
I need to create a numpy 2D array which represents a binary mask of a polygon, using standard Python packages.
input: polygon vertices, image dimensions
output: binary mask of polygon (numpy 2D a...
Travistravus asked 6/9, 2010 at 21:5
6
I've found the way to set the visibility of a marker using the following:
// create the marker
blueMarker = new google.maps.Marker({
position: new google.maps.LatLng(33.514428, -112.2905653428...
Bothnia asked 30/11, 2011 at 22:54
13
Solved
I have a set of points and would like to know if there is a function (for the sake of convenience and probably speed) that can calculate the area enclosed by a set of points.
for example:
x = np....
Megalomania asked 28/6, 2014 at 14:49
42
Solved
I'm trying to create a fast 2D point inside polygon algorithm, for use in hit-testing (e.g. Polygon.contains(p:Point)). Suggestions for effective techniques would be appreciated.
Madelina asked 20/10, 2008 at 5:20
11
I have input values of x, y coordinates in the following format:
[[1,1], [2,1], [2,2], [1,2], [0.5,1.5]]
I want to draw polygons, but I don't know how to draw them!
Thanks
Millinery asked 15/5, 2017 at 3:42
3
Solved
Hope someone can help me with this issue.
I'm trying to open an info windows on click for each polygon that my users created.
I used the same code for a marker and works well but i couldn't make i...
Eponym asked 22/10, 2012 at 18:57
2
I want to separate CO (a polygon) into sections (also polygons) that are not split by roads (linestrings). Which is to say I want the sections of smaller polygons to be bounded by roads or state bo...
Kohl asked 9/9, 2020 at 16:0
8
I'm using PIL (Python Imaging Library). I'd like to draw transparent polygons. It seems that specifying a fill color that includes alpha level does not work. Are their workarounds?
If it can't be ...
Louielouis asked 11/12, 2008 at 15:26
6
Solved
I'm not sure how to approach this problem. I'm not sure how complex a task it is. My aim is to have an algorithm that generates any polygon. My only requirement is that the polygon is not complex (...
Intine asked 25/1, 2012 at 2:16
4
Solved
I want to calculate the centroid of a figure formed by the points: (0,0), (70,0), (70,25), (45, 45), (45, 180), (95, 188), (95, 200), (-25, 200), (-25,188), (25,180), (25,45), (0, 25), (0,0).
I kno...
2
Solved
The Docstring says:
Polygon.contains Returns True if the geometry contains the other, else False
Polygon.within Returns True if geometry is within the other, else False
How are they different?
15
Solved
How would I "inflate" a polygon? That is, I want to do something similar to this:
The requirement is that the new (inflated) polygon's edges/points are all at the same constant distance ...
Bimestrial asked 10/7, 2009 at 13:32
6
Solved
As shown below,
Is it possible to split a Polygon by a Line? (into two Polygons). If the line doesn't go all the way across the polygon it would fail.
Is this possible? If so, how would I do t...
2
i need to merge all touching polygons from a shapefile with geopandas. So is there a solution for. for example, the image below must be one polygon instead of multiple polygons.
thanks
25
Solved
Having a list of points, how do I find if they are in clockwise order?
For example:
point[0] = (5,0)
point[1] = (6,4)
point[2] = (4,5)
point[3] = (1,5)
point[4] = (1,0)
would say that it is ant...
Cafeteria asked 22/7, 2009 at 14:24
3
Solved
I have a bunch of coplanar points defining a polygon in 3D space. These are always wound the same way (e.g. clockwise). I need to determine the signed normal to the plane containing this polygon, i...
Hazelwood asked 28/8, 2015 at 15:3
9
Solved
I have a convex polygon (typically just a rotated square), and I know all of 4 points. How do I determine if a given point (yellow/green) is inside the polygon?
EDIT: For this particular project...
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