All Questions
5,940 questions
3
votes
2
answers
30
views
Finding corners where multiple polygons meet in QGIS
I have a shapefile of polygons representing sectors of a city. I would like to identify "corners" where 3 or more of these polygons meet (that is, I don't want to identify the boundaries ...
- 407
4
votes
4
answers
57
views
Multi-ring buffers of uneven sizes in QGIS
I am trying to make multi-ring buffers (donuts) around points in QGIS. I want the rings to be from 0 - 2km, 2km - 5km, 5km - 10km. I'm using the multi-ring buffer in QGIS and it doesn't have the ...
- 41
1
vote
1
answer
30
views
Using "Symmetrical difference" for multiple layers at once in QGIS
I have four different layers (Parks, Forest, Sports ground, Nothing) inside my city analysis and I want to make several different new layers out of them.
I want to find out, which places have which ...
- 11
-1
votes
0
answers
69
views
Clipping a raster layer to a polygons shapefile but nothing is actually clipped
I am using QGIS. I have the following polygons shapefile of the New York City Boroughs at
EPSG:2263 - NAD83 / New York Long Island (ftUS)
I then have the following raster grid showing a KDE heat map ...
- 7
1
vote
0
answers
93
views
Converting CSV spreadsheet to shapefile in QGIS
I have a spreadsheet with the coordinates beginning:
Site Latitude Longitude
1 -37.3412 145.182
2 -37.3410 145.182
3 -37.3408 145.182
4 -37.3406 145.1821
5 -37.3404 145....
- 11
5
votes
1
answer
155
views
How can I create a print layout that is exactly filled with the contents of a shapefile?
I need to create a physical map with exact dimensions. The contents of that map should exactly match the contents of a shapefile layer that has a single rectangle in it:
So the map should just be the ...
- 153
2
votes
0
answers
38
views
Calculating attributes of partially overlapping lines (roads, speeds) in QGIS
I have traffic speed data for a city covering 24 hours, represented as 24-line shapefiles. I want to calculate the average speed for the day, but many roads have partial overlaps.
In the provided ...
- 21
1
vote
0
answers
27
views
First field gets cleared (if time field) in QGIS Attribute Table
I recently noticed a strange bahavior in QGIS (currently working with version 3.34-7):
When the first field of a shapefile is named "time" (I regularly work with GPX files exported to ...
- 53
0
votes
1
answer
28
views
Masking an AOI using shapefile: Set SHAPE_RESTORE_SHX config option to YES to restore or create it [closed]
I have a .shp file I want to use as a mask on top of a .tiff satellite image which has a specified AOI, so I need to adjust the .shp file to that.
I found this doc, but I am confused on how it can ...
- 1
3
votes
1
answer
86
views
How can we tell how similar two countries look on a map?
Suppose I have these 2 maps:
I can represent these two maps in matrix form:
map1 <- matrix(
c("R", "R", "R", "R", "R", "R", "R&...
- 83
3
votes
1
answer
86
views
Can shapefile hold style information?
I have been using Google Earth KML files for a while and I know they can contain style information such as line width and color. I've recently started working with shapefiles and learned that KML can ...
- 67
0
votes
1
answer
39
views
Shapefile and Google Maps QGIS 3.34
I opened my shapefile which contains my fields.
I also opened QuickMapServices-Google Satellite
My fields are not shown in right place in Google Satellite. My fields are shown in the ocean...
- 287
0
votes
0
answers
28
views
QGIS doesn't show network drive directories
Today QGIS wouldn't let me open up without starting it as an administrator, after doing that the drives from our company server were not shown anymore and the local ones C: and D: had a lock attached ...
4
votes
1
answer
155
views
Converting point shapefile into polygon in QGIS
I have a point shapefile in QGIS 3.26. It is made of many points, and many overlap with each other. I need to make a polygon shapefile out of these points so that those points that overlap or are ...
- 645
0
votes
0
answers
39
views
Rasterio:Generate GeoTIFF Image from a Multipolygon after buffer
After import a raster file and add buffer of 20 meters I want to write a new raster with this dimensions, but getting error:
import rasterio
from rasterio import features
from rasterio import ...
- 1
0
votes
0
answers
14
views
Rasterio: Gererate GeoTiff Image from a Multipoligon after buffer [duplicate]
After import a raster file and add buffer of 20meters I whant to write a new raster with this dimensions, but getting error:
import rasterio
from rasterio import features
from rasterio import ...
- 1
0
votes
0
answers
66
views
Exporting shapefiles from QGIS to Unreal Engine
I am a beginner with QGIS and Unreal Engine.
I have a shapefile of rivers.
What steps do I need to take to export the shapefile from QGIS so that it can be utilized in Unreal Engine and align properly ...
- 1
1
vote
0
answers
52
views
Polygon misalignment issue
I've been tasked with coming up with a flood evacuation plan for a neighborhood, but the shapefile I've been given has misaligned polygons. The layer CRS is EPSG:3380 - GDM2000/Selangor Grid
Any ideas ...
0
votes
1
answer
84
views
Exporting feature to shapefile using ArcGIS Pro
According to a third-party YouTube video from 2021 named Exporting to Shapefile with ArcGIS Pro, to export a feature to a shapefile, using a version available at that time, you right click on the ...
- 370
1
vote
1
answer
84
views
Automatically join attributes by location in QGIS
In QGIS, I want to automatically perform spatial joins every time I load a CSV layer with coordinates.
For example, my CSV file contains columns like 'state' and 'mean windspeed' (which are initially ...
- 11
0
votes
1
answer
58
views
Merging multiple road layers into one (like on topo maps) using QGIS [closed]
I have two shapefiles in QGIS containing polylines. One has 7m wide lines and the other has 5m wide lines. They currently exist on different layers, making intersections look like overpasses.
How do I ...
- 21
0
votes
1
answer
40
views
(QGIS) Have each field of an attribute table become a band when converting from shp to raster?
I'm assigning an importance level to two different types of areas (3 for protected areas and 5 for umid areas) and have joined these two areas and created a third field on the attribute table to sum ...
0
votes
0
answers
55
views
Exporting shapefile from Civil3D to QGIS goes to wrong location
I am trying to export shapefiles from Civil3D to QGIS. My Civil3D drawing is set to NAD83 Pennsylvania State Planes, North Zone, ft" (EPSG 2271), and my QGIS file is set to the same coordinate ...
- 1
0
votes
0
answers
42
views
Extracting daily max temperature data of shapefile area and converting into monthly mean data using Google Earth Engine JavaScript API
I want to correct this code for converting the daily max temperature data into monthly mean temperature data. I have used the ERA5 dataset and want to find data for multiple shapefiles. It shows an ...
- 11
0
votes
1
answer
66
views
CRS name is filled in but EPSG blank
I am reading in some shapefiles that have matching shapefile properties in Arc but after reading them in and checking with terra::crs() in R one spatVector has NA for authority and code. In shapefile ...
1
vote
1
answer
90
views
How to buffer, merge and save large spatial data from PostGIS to shapefile
I am using a PostGIS database (PostgreSQL 14, PostGIS 3) where I have a table layer_polygons containing layer polygons. It has a column geom containing the geometries and 5 columns for attributes ...
0
votes
0
answers
57
views
Creating 3D shapefile using QGIS of cube with co-ordinates taken from underlying OSM map
Background to the problem
Within QGIS I have two shapefiles representing a roads layer and a buildings layer (both taken from OSM).
I now need to create a third 3D shapefile representing the airspace ...
- 9
0
votes
2
answers
224
views
Converting SHP to CSV in QGIS
How can I convert SHP to CSV using QGIS?
I tried online converters but they aren't for free. Free ones have limited MB.
I have a 10.3 MB zip file and it doesn't work on these online websites.
1
vote
0
answers
49
views
Point with polygon join returning a polyline
I'm new to spatial coding and I am trying to do a spatial join between a shapefile that has point information and a shapefile that has polygon information. The output should be a shapefile with the ...
0
votes
1
answer
38
views
Measure area of polygon inside your area of interest AND update Attributes Table in QGIS
I've hit a wall trying to truncate WBD polygon areas inside my area of interest for the determination of that area, and having that measurement amended in the Attributes Table.
I cannot use the manual ...
0
votes
0
answers
73
views
Going back to earlier version of shapefile that was saved in QGIS
By mistake I edited all cells of a table in QGIS. I saved it without knowing that and I need to go back to the earlier version, before it was saved. Is there a way to do it?
0
votes
0
answers
30
views
Adding a Shapefile to a water mask made from a DEM file
I created a water mask from a DEM File. But there are no lakes and rivers on this water mask. I want to add some lakes and rivers to it. I tried to do this with Shapefile but I couldn't merge them. ...
- 37
0
votes
1
answer
50
views
How do you scale a polygon by X, Y values in ArcGIS Pro?
I am working with a shapefile that has a series of polygons (for states, countries, etc.)
In my case, I would like apply a linear transformation to one of the polygons using this matrix:
0.64
0
0
1....
2
votes
1
answer
109
views
How to get CRS (coordinate system) of a shapefile. Java
I am reading a shapefile using org.geotols 9.4 and trying to get CRS code but org.opengis.referencing.crs.CoordinateReferenceSystem is null:
FileDataStore store = FileDataStoreFinder.getDataStore(...
- 497
0
votes
1
answer
68
views
Shapefile not converting to raster file
I downloaded a river shapefile via OSM. I need to convert it to raster. However, when I use raster converter, it comes out empty. What do you think is the cause of this?
- 37
0
votes
1
answer
49
views
Split shapefile according to DEM file boundaries
As you can see in the image, the shapefile extends outside the DEM file. How can I split the shapefile to fit the DEM file boundaries exactly?
I will use this DEM file as a water mark. So the ...
- 37
3
votes
1
answer
73
views
Sync Layernotes between Projects
Is there a way to let the layernotes of one shapefile show up and update in multiple different projects?
I would like to leave some notes for my colleagues, having the same shapefiles but in different ...
- 107
0
votes
1
answer
67
views
How to convert daily ERA5 data to Monthly mean data in GEE
I want to convert daily max temperature data to monthly average from ERA5 daily data
// Combine shapefiles into a list
var shapefiles = [
table, table2
];
var variables = [
'temperature_2m_max',
...
- 11
0
votes
0
answers
52
views
Python geopandas, adding a basemap with contextily causes some shapefiles to disappear
I am trying to make a map with several layers and a light grey background basemap from carto DB positron.
This code works (no basemap), all crs set to "EPSG:5070":
import matplotlib.pyplot ...
- 31
2
votes
1
answer
139
views
Extract geometry information from a .shp file without the associated files
A client sent me a shapefile: C:\example.shp Of course they forgot the .shx, .dbf, .prj, .etc. All I really care about is the geometry and I know that it is stored in the .shp. Is there a way to ...
- 486
1
vote
0
answers
36
views
Opening .img file created in Erdas Imagine 2023 in Erdas Imagine 2022
I am having an issue working with a file created in Erdas Imagine 2023 in Erdas Imagine 2022. I ran a tool with the output .img. However, the .img format seems to be different in Erdas 2023 vs Erdas ...
- 11
0
votes
1
answer
58
views
How to export Polygon as Polygon in a shapefile using QGIS Desktop 3.10.12
Whenever I want to export polygon layer as a shapefile
the exported shapefile always ends up with a multipolygon geometry even when during the export I specify geometry type as polygon.
- 497
0
votes
1
answer
64
views
Outputting dataset with "fraction overlap" between two types of areas [closed]
I have two shapefiles: one containing boundaries for Census tracts, and one containing boundaries for "districts". In my case, districts are larger than Census tracts and, additionally, ...
- 11
1
vote
0
answers
34
views
How to create image(DEM) with countour and buildings shapes
I'm GIS beginner and I'm trying to make a DEM with building's height.
Step 1 > I get a countor shape file.
Step 2 > Generate a DEM.
Step 3 > I get a Buildings shape file.
And then, how can ...
- 11
1
vote
0
answers
43
views
Updating a cadastral feature hosted in Geoserver with an empty WFS through QGIS
I've looked through the similar questions and did not find what I'm looking for.
We have hosted a cadastral shapefile in Geoserver. We need to update this cadastral feature with new parcels, but we ...
- 61
0
votes
2
answers
165
views
Error uploading assets into GEE: error code 3
I am getting an error while trying to upload a shapefile into Google Earth Engine.
Error: Projection exception. Ensure the projection is specified
correctly and the coordinates are within its valid ...
- 1
2
votes
0
answers
49
views
Creating built/urban blocks using building shapefile in ArcGIS Pro
I have a shapefile with individual building footprints, each associated with a Point_ID, which represents a 250 m buffer containing multiple buildings. My goal is to merge these footprints within each ...
0
votes
0
answers
24
views
Stop showing Google Earth Pro question
How can I stop Google Earth Pro from asking me the question:
Do you want to apply a style template to the features you ingested?
when I try to import a shapefile?
0
votes
1
answer
24
views
Replacing a bounding box a shapefile in DEA Phenology code
I am using the DEA Sandbox Vegetation phenology notebook (https://knowledge.dea.ga.gov.au/notebooks/Real_world_examples/Vegetation_phenology/)
I am hoping to call on a shapefile rather than using lat/...
0
votes
0
answers
59
views
Projecting world map from Equirectangular to Azimuthal Equidistant results in seam along 180th Meridian
I am attempting to reproject shapes from Equirectangular to North Pole Azimuthal Equidistant. However, I have noticed that it creates a seam along the 180th Meridian:
Notably, the polygon containing ...
