Questions tagged [boundaries]
For questions related to data for boundaries of real world features, such as those of administrative regions, cities, and towns.
150
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Put a boundary line on the image that is already clipped to shapefile, the boundary of the same shapefile in Python
I managed to clip the image to the shapefile, but when I plot I see that it is following the pattern of the shapefile, but I want the boundary to appear on the final image too.
Here is the code
fig, ...
4
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1
answer
133
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How can I label boundaries between two or more regions using their perimeter and making their names face each other?
I want to label the boundaries between different municipalities. I want to reach something similar to the image I´m attaching . I´m using the latest version of Qgis and tried many ways but without any ...
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1
answer
96
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Align edges of polygon to another polygon but only within a distance
I'm trying to align the edges of one polygon with another but only for a section of the polygon in ArcGIS Pro. Basically, I want to align the boundaries of the two polygons but only if they are close ...
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1
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80
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Extract national boundaries from file [closed]
I would like to know how to extract national boundaries coordinates into a text file.
I've downloaded some files from natural earth (like shapefile, json etc..) but I don't know how to use them.
My ...
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57
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Extract boundary from merged polygon QGIS
Summary of situation: i got several layers with different parts of one territory, there are not only boundaries and square but also other stuff (i mean all lines inside)
I merged layers and turned ...
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60
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How to create a boundary where the only things to be visualized from the main layer are inside that boundary [closed]
I'm trying to do something like this:
I'm only interested in the things inside that polygon. How can I do that? I'm using QGIS 3.28.3 'Firenze'.
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3
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1
answer
2k
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World Map without break line at 180 Meridian (Russia) [duplicate]
I want to create a map of the world (in my case Winkel Tripel but could be Miller or Equal Earth as well) showing Russia's full extent to the right, like in this example - which might be a very common ...
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1
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1
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62
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Thiessen polygon delineation within a feature (polygon) not extent
I am trying to create Thiessen (Voronoi) polygons, based on points with a defined shapefile (separated polygons).
The output should be inclusive to the feature. The output I receive now is the ...
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1
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153
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What spatial interpolation is going on with interpolate_pw: population weighted or population-areal weighted?
I think I want to use interpolate_pw from the tidycensus R package to interpolate data from 2000 to 2010 county boundaries. The R documentation describes this as population-weighted interpolation. The ...
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1
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1
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93
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Moving polygon to edge of boundary using QGIS
I have a set of polygons that have been drawn using a set of plotted addresses.
All of these polygons fall within a geographical boundary of the local area.
As the boundary is drawn using local ...
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329
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How to create a boundary polygon around raster extent (.tif) in QGIS
I would like to create a polygon around the raster (.tif) extent so I can calculate for instance the area in m2 within the polygon.
When I try to Polygonize or Clip raster by extend (and delete the 0 ...
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143
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QGIS: How do I clip away rivers extending beyond my state shapefile? [duplicate]
Re-learning QGIS after a four-year hiatus. I'm trying to make a basic map of the state of Nebraska, complete with county boundaries and a river-system shapefile. I have both shapefiles present in the ...
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1
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69
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How to create a rough boundary/contour around a binary raster?
I want to create a very rough boundary or a contour around the below attached raster.
It should mainly contain the "big" black pattern without the smaller black spots but with the white ...
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153
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Create raster from numpy array with boundaries
Working on creating a raster with a constant value for all pixels for land with python. A sample raster is read to get the projection, geotransformation for the the new raster. The raster has the US ...
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121
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Where can I find a map of US county boundaries that reasonably shows the boundaries over bodies of water?
Census, ESRI, and others provide shapefiles and feature classes of US county boundaries, but all the data sets I can find seem to clip the boundaries at the shoreline. So they really only show the ...
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1
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62
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How to filter points (LAT, LONG) on a map within a line boundary I created
I am fairly new to QGIS and I have a data set of points that I have plotted with lat & long. The points cover a large area and I'm am trying to figure out if there is a way to only show the points ...
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1
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423
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How to show pixel boundaries of a given raster in QGIS?
The Norwegian Meterological Institute provides historical weather data. I download one of these .nc files:
curl https://thredds.met.no/thredds/fileServer/ngcd/version_22.09/RR/type2/2022/08/...
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108
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Plotting ERA 5 Data for Specific Region on Google Earth Engine [closed]
I am trying to plot (show data on interactive map) ERA 5 daily averaged Precipitation, but I can't figure out how can I plot for a specific region (bounding box)? The map shows the data for the whole ...
0
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2
answers
51
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Unable to join data from another layer
I have two polygon layers, I want to join the data based on the location from one layer to another layer. But only field is joining not the data.
In image green is one layer and red is another layer. ...
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74
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Merging layer features by boundaries
I'm trying to combine the features from a layer in QGIS by distance. Basically I have the following layer with some features.
I wanted to remove the small gaps (as seen in below image) between them.
...
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47
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Eliminating overlaps and gaps between polygons using ArcMap
I work in ArcMap 10.8 with an Advanced level license.
I work with geological maps. In particular, the scale is 1:500000. I have a lot of line objects (different elements of a relief) that have common ...
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1
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68
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Can't make sense of (UTM?) boundaries coordinates from Statistics Canada
I downloaded a GML file of cities boundaries from Statistics Canada, but I can't make sense of them. For example, when looking at the boundaries for a city north of Toronto (Markham), the first ...
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3
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404
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Calculate length of common boundary
I have two different layers, the pink and the blue one. The green polygon is given by the intersection of the other two layers. I want to calculate the length of the common boundary line between the ...
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59
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Boundary Placement in QGIS 3.x
in ArcMap there is a great function for polygon labels - boundary placement. So at the boundary with a new polygon the labels of both polygons are displayed opposite each other.
Is it possible to do ...
3
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2
answers
451
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Clipping vector layer with preserving boundaries of polygons in QGIS
I would like to clip a vector layer containing buildings by a rectangular boundary (also a vector layer). However, rather than cutting straight through the buildings at the boundary, I want it to ...
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2
votes
1
answer
141
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Clustering of points but with a condition of not crossing set of lines
I have multiple sets of around 200-300 points and I have the following requirements:
Cluster the points in each set into a group of points with a minimum
& maximum number (as defined by me).
In ...
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4
votes
2
answers
795
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Creating different kind of outline for many polygons in QGIS
Is it possible in QGIS 3.4 Madeira to change stroke width on number of polygons?
But I want only to outer boundary be different thicker line and I want to inner boundary remains thinner.
Example:
All ...
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7
votes
2
answers
2k
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Higher resolution of country borders
I have been looking and looking for a long while, but I was unable to find any freely available datasets for country borders with resolution higher than 1:1000000. I found this strange as I thought ...
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67
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ArcMap minimum bounding geometry around groups of lines massive spike stretching far into the distance
ArcMap 10.4.0.5524 for Desktop. No internet connection.
I have a bunch of lines that represent roads. I would like to make convex hulls to isolate groups of these roads. When I do this in ArcMap, a ...
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3
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194
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Avoiding buffer exceeds layer boundaries in QGIS
I generated random points within my map in QGIS. Then I created a buffer zone of 5km around each point because it is necessary for my analysis.
However, now the buffer zone crosses over the layer ...
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3
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0
answers
98
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Adding attribute of polygon orientation depending on neighbors in QGIS
I have a shapefile with buildings as polygons. Is it possible to add attribute columns referring if the polygon boundary is "other polygon" or "outdoors" for a certain orientation (...
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0
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118
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How to find average distance of points in polygon to boundary of polygons?
I have a layer of polygons and a layer of points that I lay on top of those polygons. Some polygons, which I will refer to here as "zones", will contain 1 point within their boundary, and ...
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1
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124
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Defining river boundaries so that TIN interpolates within those boundaries
I am a new QGIS user just learning the product. As part of our works we take depth soundings around river bends. I have worked out how to do basic contours with colour bands in the background using ...
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0
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112
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Generalise low resolution World Bank boundary data
I'm trying to generalize World Bank Official Boundaries:World Boundaries GeoJSON - Low Resolution from https://datacatalog.worldbank.org/dataset/world-bank-official-boundaries using QGIS 3.18.3, using ...
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110
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Polygon coordinates are wrong after shapefile import
I have shapefile I have imported, but the polygon coordinates are wrong. Was the shapefile exported incorrectly or is there something I'm missing.
Point 30.8843 -29.9688 should fall in the boundary.
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2
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862
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Finding distance from points to the boundary of the nearest polygon in Python
I asked this question on stackoverflow.com but it seems that doing so here is a better option.
Context: I want to compute the distance from points to the closest boundary of the closest polygon to ...
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1
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749
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Extract administrative boundaries with physical borders at the coast line from OSM data
I successfully downloaded the OSM data from https://www.geofabrik.de/ and converted the .osm.pbf file to a .gpkg using og2ogr. Now I want to extract administrative boundaries using DB-Manager and SQL:
...
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2
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522
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How to move data according to the distance [closed]
I have a data in the shapefile format. Now I have to move them according to the boundaries. Is their any solution to move according to the distance without manually. I want to select the data with ...
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0
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477
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Find nearest boundary of inner feature (Turf.js)
Imagine a GeoJSON FeatureCollection that contains a boundary and a feature.
The feature should be thought of as a Building and the boundary as a plot of land.
When rendered this shows the follow https:...
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0
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121
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Edge detection from Google Earth basemap in QGIS
I would like to detect boundaries of agricultural fields for 70 different polygons spread out across a country.
Is it possible to run an edge detection algorithm using the google earth (or equivalent) ...
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3
votes
1
answer
472
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Get footprint or boundary of LIDAR data
I am using the lidR package in R to manage my ALS data. I was having problems generating DTMs on the edge files of my catalog because the tool lidR::grid_terrain() was doing some interpolation between ...
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3
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List of extreme latitudes and longitudes for each US state?
I need a list of extreme latitudes and longitudes for each US state. That is, max / min latitude, max / min longitude.
The purpose is to exactly center each state map when initially shown.
I found ...
0
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1
answer
114
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Bounding Areas using Feature Collection values (RESOLVE Ecoregions 2017)
I'm pretty new to the Earth Engine and have been working through some of the tutorials to familiarize myself with it. I have very little code experience.
What I am trying to accomplish is creating a ...
2
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1
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130
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Is this ST_Relate result expected?
The following PostGIS query involving ST_Relate gives FFFFFF102 as its result:
SELECT ST_Relate(
ST_GeomFromText('POLYGON EMPTY'),
ST_GeomFromText('MULTILINESTRING((0 0,0 1),(0 1,1 1,1 0,0 0))'),
...
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2
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804
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Draw circles around points
I have a CSV layer of points which I have succesfully imported into QGIS. My assets are a bit like wireless access points and I cannot have any of the points on the same channel within 2km. I ...
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3
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0
answers
126
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Identifying which shared boundary is longest using QGIS
This is an evolution from How to specify dependable layer names in QGIS Processing Modeller but should be considered completely separately.
I am creating a model in QGIS (3.10.3) Processing Modeller (...
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1
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119
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Determining if species point data is upstream or downstream of artificial fish passes using ArcGIS Pro
I am working with ArcGIS Pro.
I am working on a project to determine how to prioritize restoration of artificial fish passes. I have been supplied with species point data, point data of the artificial ...
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1
answer
85
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Change pixel values of the open Sea to noData values
I want to calculate, which land areas of my elevation raster data set are under a specific elevation height. The open sea with pixel values of 0 should not be included in the analysis. I want to ...
0
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3
answers
58
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Separate boundary from adjacent polygons [closed]
I have a list of polygon features that share a common boundary. Is it possible to extract that line somehow? I am thinking about making a spatial join that shows me polygons that share a line segment, ...
2
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0
answers
101
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Empty pixels in polygon border
I have a vector shape file with the basins of South Carolina. Some of the sub-basins polygons have a "hole" or no data pixel in their boundary (See photos for reference 2) and I need them to ...
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