On a map, a closed shape defined by a connected sequence of x,y coordinate pairs, where the first and last coordinate pair are the same and all other pairs are unique.
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1answer
40 views
Merge attribute of points into a polygon : Arcmap 10
I have points layer which the attribute looks like this:
FID Shape ID Lat Long
0 Point 2065 -5.51666 106.48333
1 Point 2319 21.93333 120.73366
I also have polygons layer :
FID Shape ...
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vote
3answers
43 views
Openlayers vector feature coordinates are not transforming,
I have a OpenLayers vector with a single feature [0]. It's coordinates are in the map projection (EPSG:3413) and I want them in WGS84 (EPSG:4326) decimal degrees. I have the following code which ...
5
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0answers
61 views
How to find the maximum-area-rectangle inside a convex polygon?
In this post we are looking for algorithms / ideas on how to find the maximum-area-rectangle inside a convex polygon.
In the following figure, numbers are the areas of the fitted rectangles. As shown ...
1
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0answers
42 views
Are polygons created in Arcpy built in any order?
My script uses a search cursor to evaluate polyline coordinates and build polygons based on those coordinates. The script works well, but I am curious as to whether anyone knows the order (if there ...
3
votes
0answers
43 views
Masking/removing polygons from shapefile
I have a shapefile containing the road traffic noise of a city.
The shapefile has 5 columns, where 'noise_in' (noise interval) ranging from 1-5 is included.
I want to remove/mask the road noise from ...
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0answers
26 views
OpenLayers generate random polygon
I have a world map. I need randomly to generate polygons and render them on map.
I have no problem with rendering, but can anybody suggest how to generate polygons with random geometry? (I need n ...
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votes
0answers
18 views
QGIS GPS live tracking adding polygon vertices
Maybe I'm missing something or maybe it is a bug? I'm trying to add polygons using the GPS information console. The only button available to record data is "add polygon", but if you click on it, you ...
3
votes
1answer
31 views
How can I check if a multipolygon can be represented as a simple polygon?
I have a large (30m+ records) spatial data set I have imported into a PostGIS database. I did not expect to find multipolygons in the data set, but it does have a few of them. I'd like to take a ...
2
votes
1answer
43 views
How to determine the longest side of a polygon in QGIS?
Is there a possibility to determine the longest side of a polygon with QGIS? As I need to do that for hundreds of polygons I would prefer an automized method (like a plugin).
So far my idea was:
...
1
vote
1answer
40 views
Polygon Nodes do not have separate coordinates [duplicate]
I'm attempting to measure the distance of a series of points from a smaller number of polygons. As a first step, I've changed the polygons into points along their border, via the
Vector> Geometry ...
2
votes
0answers
57 views
Problems converting polygon to point
I'm trying to convert polygons to points with ArcGIS 10. My polygon layer has 2 attributes that I want to give to my point layer. I'm using the Feature to Point function from the Arctoolbox, but it ...
2
votes
1answer
66 views
ArcGIS - merge polygons and get combined area
I cannot for the love of god figure out how to combine (join?) two overlapping polygons to determine the combined area they cover in ArcGIS 10. I am sure the Geoprocessing tools can do it, but just ...
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votes
1answer
61 views
Aggregate points with same values to polygons
I have a shapefile with 2M measurement points (each measurement point has a resolution of a 1/10). How can I aggregate points around each other if and create polygons out of it?
They do not have to ...
2
votes
3answers
61 views
How to minimize the number of points in a polygon?
I'm building a web application that will be transferring polygons from server to client. Initially, the shapefile is coming from an external source that I have no control over.
Often, I find polygons ...
2
votes
1answer
45 views
Evaluate minimum points required to define polygons based on an error threshold
I need to build a model or write an algorithm to do this, which I would like you to share your ideas with me.
here is my cadastral problem: I have plenty of polygons and I need to make a report of ...
