Questions tagged [multi-polygon]
A MultiPolygon is a geometry whose elements are polygons.
115
questions
0
votes
0
answers
16
views
Storing OSM relations correctly as geometry in BQ
I am looking at the best/efficient way to decompose OSM relations and store as geography, currently I am using:
https://raw.githubusercontent.com/tyrasd/osmtogeojson/gh-pages/osmtogeojson.js
to ...
0
votes
1
answer
40
views
ST_GEOGFROMTEXT Multipolygons converted to Polygons in BigQuery
I've stumbled upon an intriguing issue while working with MultiPolygons in BigQuery. When utilizing the ST_GEOGFROMTEXT function to parse a MultiPolygon containing multiple polygons, the output ...
0
votes
0
answers
80
views
Converting CSV to MultiPolygon shapefile in QGIS
I have a MultiPolygon shapefile and the attribute table looks like this.
The district names and state names are jumbled with special characters. I know I can use the replace function in the Field ...
1
vote
0
answers
50
views
Fully filling vector layer with polygons without dissolving the current polygons in QGIS [closed]
I have a vector containing flow paths for a specific area, with values ranging from 2-4. I want to fill in the rest of the area (to the red line boundary) with another/more polygons with a value of 1 ...
- 25
5
votes
3
answers
159
views
Converting multipart MultiPolygon to self-intersecting polygon in PostGIS
Is it possible to convert a MultiPolygon to a polygon when the result is a self-intersecting polygon?
I have a bunch of MultiPolygons that are essentially originally formed to be multipolygons because ...
- 51
2
votes
1
answer
72
views
is this posible to extract coastline or border line from multipolygon geojson but keep them separate
i have multipolygon cities , how to get coastline or border line that not intersect with other cities, and keep separate each cities,
is that possible? there any software or programing method (like ...
- 23
3
votes
3
answers
118
views
Identifying which points belong to which part of the Multipolygon after extracting vertices in QGIS
I currently have a layer which is composed of different areas. I want to extract the coordinates of the vertices of the shape to CSV in QGIS, which I successfully am able to do by using extract ...
- 33
1
vote
1
answer
117
views
Finding rectangular polygons in a multipolygon
I'm trying to do some analysis that requires finding rectangular gardens of a certain size. At present, I only have access to a data set of property extents with buildings punched out with the ...
- 740
3
votes
1
answer
182
views
Combining multiple Polygons into one MultiPolygon in QGIS
QGIS 3.34.3 has a processing function "Multipart to singleparts". But what about the other way around? What is the easiest way to create a MultiPolygon from several polygons?
- 5,857
-1
votes
1
answer
46
views
Converting Here API WKTShapeType Multipolygon To GeoJSON?
I have access to a data source that looks like:
"Shape": {
"_type": "WKTShapeType",
"Value": "MULTIPOLYGON (((-128.9102 50.82492, -128.90881 50.82422,...
- 129
1
vote
1
answer
259
views
Moving individual polygons in QGIS
In QGIS I am using the "BreederMap" plugin to define the layout of a large wheat field trial with 10m2 plots. Unfortunately, the lines are not exactly straight (sowing done without GPS and ...
1
vote
1
answer
132
views
What's the best way to 'split' this layer (QGIS)?
I'm quite new to all this.
I have this polygon (MultiPolygon) which represents two areas (being visually separate), and now I want to split it so I have two polygons representing two different areas.
...
- 19
1
vote
1
answer
96
views
How to remove small polygons using Python
I would like to perform in Python, the action done by the following QGIS command:
Processing Toolbox > Vector Geometry > Keep N Biggest Parts
It removes the smallest polygons from a ...
- 203
0
votes
1
answer
159
views
Simplify multipolygon in Google Earth Engine
I am working on Google Earth Engine and trying to simplify a multipolygon by first reducing its vertices and then removing unnecessary polygons that have fewer than 5 vertices.
var gaul = ee....
- 3
2
votes
0
answers
70
views
QGIS converting MultiPolygon to MultiSurface - can I disable QGIS from doing this?
I have MultiPolygon data stored in a PostgreSQL DB (13.9) and am editing this through QGIS (using 3.28.3-Firenze). Occasionally when editing, some features are saved back as MultiSurface features. ...
- 21