Questions tagged [polygon]
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.
4,644 questions
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Getting Geodesic Area of GDAL polygon in C
I am using GDAL to create polygons for a GeoJSON:
OGRFeatureH hFeature = OGR_F_Create(OGR_L_GetLayerDefn(hOGRLayer));
OGRGeometryH hLinearRing = OGR_G_CreateGeometry(wkbLinearRing);
OGR_G_SetPoint_2D(...
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Numbering polygons in clockwise-ish way in QGIS
I'm using QGIS 3.40.12 and I have a shapefile with polygons, each of them represents a plot and I need to give them a number, an "ID". But the spatial order of the numbers should have a from ...
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How to change the order of legend items/polygons in same layer? (QGIS 3.40.5)
I have a layer in QGIS that I used the categorized function in symbology. Some of the polygons are overlapping, and it seems quite random which polygon is on top and which one is underneath. I would ...
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How can I make tidy balloon callouts for these multiple polygons in QGIS 3.44.6?
I want to make balloon callouts for a polygon layer showing water drainage basins of Slovakia, I get via this link:
https://arcgis.shmu.sk/arcgis/services/externe/PodrobnePovodia50/MapServer/WFSServer
...
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Generate random color styling for many shapefiles using GeoServer
I'm uploading a huge number of shapefiles into my GeoServer, around 150 of them.
The issue is that their style is set to a grey fill by default and I wanted these shapefiles to be random colored, just ...
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Creating continuous polyline within polygon in QGIS
I am creating a flight path for an aerial survey. I need one continuous line crossing over the area to be surveyed. The line needs to be made up of long horizontal stretches spaced 500m apart and ...
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Creating a dimensioned polygon trapezoid feature in ArcGIS Pro
I am creating a runway approach trapezoid and need to construct the following polygon shape (top half of image looking down). I have created a feature class for a polygon, and started to draw the ...
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In QGIS a line to infinity appears on a polygon when editing, how to elininate and prevent
I deleted the polygon, then digitized it again snapping to surrounding polygons and line ends. A line to infinity appeared again as I fine tuned the polygon where I had missed snapping to a few points....
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Definition of clockwise polygon
Many formats specify that the border of a polygon should be oriented clockwise or counterclockwise. However, they never explain what they mean by that. I can think of at least two definitions, that ...
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Rotation goes awry on QGIS
I am using QGIS 3.32.3 on a MacBook Air running OS Sequoia 15.6.1.
I have a project with one layer depicting the lower 48 U.S. states, another showing Alaska.
The project is in ...
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Modifying one feature's coast by another feature in QGIS
In my QGIS project, I have two layers, a landmass layer, and a political units layer.
I just made my landmass layer's coastline a lot more detailed, and I would like for features on my political units ...
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Is there a QGIS plugin that creates evenly spaced points within a polygon layer?
I’m looking for a way to automate a task in QGIS.
Given a polygon layer, I need to generate a specified number of points inside it, with a fixed spacing (e.g., points every 2 meters). Doing this ...
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I want to press the smaller polygon into the larger, QGIS?
I have cases where one polygon is on top of another. I want to press the smaller polygon into the larger one so that the surface underneath the smaller polygon disappears, and the smaller polygon ...
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Creating point feature buffer as circle rather than as polygon in QGIS
We routinely create Tree Protection Zone and Structural Root Zones from tree location point data that has the circle radius values in QGIS. However, QGIS, using the buffer tool, creates multi point ...
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"Joining" weirdly aligned polygon and line features in ArcGIS Pro
I have a polygon layer and a line layer, and I need the polygon layer to permanently retain an attribute from the line layer. Polygons should be matched with the line feature that has the most ...
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