2,030 questions
0
votes
1
answer
73
views
Compute Jaccard Index for two similar but not equal shapefiles in R [closed]
I have two distinct shapefiles that have a high degree of overlap, but aren't the same. I want to make a comparison and one of the things I would like to generate is the Jaccard Index of regions ...
- 345
Best practices
2
votes
8
replies
167
views
Intersecting very large shape files with thousands of multi-polygons
I have several multi-polygons shape files (the data is here https://habitats.oceanplus.org/, I don't have a way to provide direct downloads).
These shapefiles are anywhere between 200Mb to 1Gb and ...
- 1,543
0
votes
2
answers
152
views
Split .gpx tracks file by polygon and calculate the time and distance in each polygon
I have many .gpx track files where people made one track but covered distance in multiple treatment areas (within different polygons). I have a shapefile for each polygon and individual .gpx files. I ...
- 385
0
votes
1
answer
92
views
Implementation of MultiPolygonZMField in GeoDjango/django
I have an .shp file and the ogrinfo resulted as follow
# ogrinfo -so AnalysisV1.shp AnalysisV1
INFO: Open of `AnalysisV1.shp'
using driver `ESRI Shapefile' successful.
Layer name: AnalysisV1
...
- 586
3
votes
1
answer
106
views
Unable to zoom or hover map using nested subplot()
My interactive dashboard where multiple Plotly objects including maps are displayed using nested subplot() in R:
library(digest)
library(sf)
library(jsonlite)
library(plotly)
library(ggplot2)
library(...
- 31
1
vote
1
answer
58
views
ggplot Bathymetric shapefile plotting in a single colour
I have a bathymetric shapefile structured as below.
str(Ab_bath)
Classes ‘sf’ and 'data.frame': 126 obs. of 13 variables:
$ CLRRGB : chr "2844D9FF" "2651DCFF" "215DDEFF&...
- 541
0
votes
1
answer
56
views
'Unknown geometry type' error with shp2pgsql
I use las2tin to generate tin(in .shp format) for a las.
las2tin64.exe -i input.las -o tin.shp
Then I use shp2pgsql to create a sql with this shape file:
shp2pgsql -s 4326 tin.shp temp_table > tin....
- 7,768
0
votes
1
answer
81
views
It is possible in Oracle Apex 24.2 to build something to download/export a table that has SDO_GEOMETRY in shapefile format?
I have tables in Oracle that contain spatial data using the SDO_GEOMETRY data type. I would like to create a button inside APEX that allows users to download a zipped shapefile export of this data. ...
1
vote
1
answer
114
views
Apply a Pacific-centered projection and add coordinates to a ggOceanMaps basemap
I want to plot satellite tracking data. I previously did this by manually importing the country outlines and satellite data without using ggOceanMaps:
However, I would like to use the basemap() ...
- 11
0
votes
1
answer
142
views
R Convert a list of polygons into a shapefile, where each polygon is a feature of the shapefile
I'm trying to convert this list of polygons, named all_buffers, into a shapefile. I'd like each polygon to be its own feature in the shapefile. Everything I've tried has only exported one single ...
- 31
0
votes
3
answers
133
views
Efficient handling of shapefiles with many polygons in R: simplification and merging
I have two shapefiles: one represents the counties in the United States, and the other represents the census divisions in Canada. I’d like to combine the two. To do this, I used the sf::st_union ...
- 199
1
vote
1
answer
50
views
Output on the map leaflet js big data from .shp-file
I have a shp file with big data-polygon that needs to be displayed on a leaflet map. First, I tried to convert .shp to geoJson. The data was displayed, but the load on the client device was very high -...
- 209
2
votes
1
answer
203
views
How to extract data from leaflet-generated pages
Is it possible to scrape the polygon data from this interactive map in R?
🔗 https://fogocruzado.org.br/mapadosgruposarmados
The map shows territories controlled by armed groups across different years....
- 105
0
votes
1
answer
57
views
Can I use a custom topoJSON file with Filled Map in free Power BI?
I'm building a map dashboard in Power BI Desktop and want to visualize custom regions using a topoJSON file (converted from a shapefile). I'm using the Filled Map visual.Tutorials suggest this is ...
- 81
0
votes
1
answer
67
views
How export z values with shape file
I have successfully created a filled contour map with UTM data from a numpy array and exported to a shape file, but the shape file only has polygons with no other data. The partial code is:
#Convert ...
- 3
0
votes
0
answers
21
views
Is there a way to save all Geotags for specific tags from Flickr as a Shapefile?
I created a code with Jupyter Notebook to download all geotags from Flickr pictures with specific tags. The code works but when I open the shapefile in ArcGIS, there are like 400,000 points, which ...
0
votes
0
answers
40
views
ESRI Shapefile for US
I have been looking for an ESRI Shapefile for the United States (including Alaska and Hawaii) with state boundaries but with Alaska and Hawaii tucked underneath Texas and neither of them looking ...
- 33
0
votes
0
answers
69
views
Is there any way to export Shapefile from leafletjs map?
For example, this page:
https://opendatabot.ua/l/7422785500:01:002:0916?from=search
The map on this website is built using Leaflet.js, and it displays the area boundaries. Is there a way to extract or ...
- 79
2
votes
1
answer
96
views
How to draw a shapefile with ggpolar [closed]
I want to use ggpolar to plot a polar projection map of raster data, but the outermost pixels tend to obscure the land boundaries. Therefore, I want to add a local shapefile, but I failed to draw it ...
- 65
0
votes
0
answers
49
views
How to add a shapefile/GeoJSON boundary to a map in Leaflet?
This would appear to be the most basic and trivial thing, except that I can't find out how to do it. I have a shapefile which contains the boundaries of all electorates in my state (this is in ...
- 1,414
-1
votes
1
answer
47
views
How to convert ESRI shapefile into .csv with the following fields
I am trying to convert the data shown here into a .csv that contains these following fields
The current script I have takes in the .shp using geopandas and outputs it as a csv. However, the normal ...
- 21
0
votes
0
answers
61
views
Connecting multiple components into a single interconnected network
I’m working with an sf file containing a road network, where each row represents a road segment. My goal is to create a fully connected network, so I tried building the network using the sf_network ...
- 1
0
votes
0
answers
61
views
Map size problem in plot window when plotting the world map
I have a problem with the map size in the plot window.
The data I am using can be downloaded from this USGS Terrestrial Ecosystems of the World link.
Here is the code:
library(sf)
library(ggplot2)
...
- 1
0
votes
1
answer
45
views
Extracting common polygons into a new shape file
I have two shape files from a survey conducted through different time-frames: file_1 (with 40 polygons) and file_2 (with 280 polygons). Each vector in these files are allotted a unique id and are ...
- 7
1
vote
1
answer
548
views
geopandas.read_file of a shapefile gives error if crs parameter is specified
All,
I use ESRI World Countries Generalized shape file, that is available here
using GeoPandas
shp_file =gpd.read_file('World_Countries/World_Countries_Generalized.shp')
print(shp_file.crs)
The CRS I ...
- 725
0
votes
0
answers
49
views
error when doing lm test for spatial autocorrelation in error terms
Below is an image of the data for some variables in pdata.frame format. The panel is for 166 municipalities in RN for 4 years, generating a total of 664 observations.Can I make the panel available on ...
- 59
1
vote
1
answer
47
views
How do I make alterations to this shapefile in python with geopandas or cartopy?
How do I add light grey state lines, change the background to white, and change certain areas to certain colors? This is from the EPA Level2 ecoregion map. I'd like to color each ecoregion a separate ...
0
votes
0
answers
27
views
create kernel density raster where locations are duplicated (a lot!)
I have a dataset identifying locations of individuals at stationary receivers. So, I have many, many duplicated locations (multiple locations at one receiver over multiple days). I am trying to run a ...
- 389
1
vote
1
answer
73
views
Error saving a tess object as shapefile in R with sf::st_write
I'm using the spatstat package to create a hexagonal tessellation over a specified area and count points within each hexagon. After that, I want to save the tessellation as a shapefile for use in GIS.
...
2
votes
1
answer
1k
views
Geopandas fails reading geojson
I'm trying to read a geojson I created using these steps
import geopandas as gpd
vec_data = gpd.read_file("map.shp")
vec_data.head()
vec_data['LPIS_name'].unique()
sel_crop = vec_data[...
- 375
0
votes
1
answer
69
views
combine different shapefile feature classes based on their names and geometry
I have a shapefile which contains various feature classes I'm able to read
I improved my code thanks to the suggestions of @Pieter
import geopandas as gpd
from shapely import box
from shapely.geometry....
- 375
0
votes
0
answers
122
views
Is there a better and effective way to convert a large raster file into a vector point?
The idea is to convert some raster files (39 fire occurrences) into vector points (.shp), allowing the use of the extract() function in the terra package to relate the occurrence points to another ...
- 1
1
vote
1
answer
117
views
Features lost after removing Z and M dimensions from shapefile
I am using this roadway functional classification data from the Open Data DC.
When I load the shapefile and run the following code:
## Read roads shapefile
DC_Roads <- read_sf('data/...
0
votes
0
answers
74
views
How to correct erroneous CRS in the function coord_sf() in ggplot after merging shapefiles together to zoom into a specific region in R
Issue
I have three shapefiles that exhibit our study area and contain the "EPSG - 4326". After researching, the exact EPSG for our study area is "3355 with transformation: 15846" ...
- 1,247
1
vote
1
answer
2k
views
How to use the function read_sf() in the sf package to read a shape file when it works in QGIS in R
I have a shape file called gadm41_EGY_1.shp, which I have successfully been using to do analysis in QGIS, and I want to read it into R using the function read_sf() in the sf package.
I want to do a ...
- 1,247
0
votes
2
answers
157
views
How can I split state shapefiles in R?
I have the shapefiles of US states that I downloaded from the United States Census Bureau. Here is a link for the 2024 data as an example.
I'm working on a map in tableau and need to split a few of ...
0
votes
1
answer
133
views
How to find the appropriate CRS for shapefile with strange extent in QGIS
I have a shapefile that I need to import. It has an extent as follows:
6070755.0197066366672516,2191083.7598814815282822 : 6213671.7394500551745296,2236821.9991134637966752
The layer does not have a ...
- 61
0
votes
1
answer
83
views
How to make a simple edit of a field value using pyshp
I'd like to change the values in a shapefile (dbf file only, not any of the geometry). That would seem to be most common usage of pyshp to me, yet I am mystified as to how to code it.
Imagine I start ...
- 1
0
votes
2
answers
221
views
What is the proper way to repair/recreate the .shx of an ESRI Shapefile using gdal?
I can recreate the missing .shx file by using the gdal command ogr2ogr and specifing the config "--config SHAPE_RESTORE_SHX YES".
But, although it recreates the .shx file it gives me an ...
- 331
0
votes
0
answers
52
views
how to add shapefile (basin boundary) to tiff file (iran map) in python
I have Iran's rainfall zoning map in TIF format and I get the output using the following code. But the border of the basins is not clear.
how to add shapefile (basin boundary) to tiff file (iran map) ...
- 1
1
vote
1
answer
61
views
boxplot two rasters and one shapefile
The code works with one raster and one shapefile. I tried to expand the code to use stack() for the two rasterfiles (present and future climate, paired boxplots), because extract(r,v) is available for ...
0
votes
1
answer
50
views
message in shapefile with st_read
I am working on Rmakdown, but when I make the pdf it prints messages that I cannot delete.
Reading layer `ine_barrios_mvd_nbi85' from data source `C:\Users\54427965\Desktop\Hom Barrios y Secc\BARRIOS\...
- 25
0
votes
1
answer
99
views
boxplot of raster and shapefile
This example code works
library(raster)
library(sp)
library(rgdal)
library(ggplot2)
# Create some sample raster data
raster_file <- raster(ncol=36, nrow=18)
raster_file[] <- 1:ncell(raster_file)...
0
votes
1
answer
144
views
netCDF file without crs/Clipping to the shape file with projected shape file
Issues Encountered:
The NetCDF file has rotated grid coordinates (rlon, rlat), which adds complexity to aligning it with the shapefile.
When I try to clip the NetCDF data with the shapefile, I receive ...
-2
votes
1
answer
120
views
Unable to import mbtiles generated with MapTiler in Mapbox studio
I’m trying to import a tileset generated from a QGIS vector shapefile processed by MapTiler in Mapbox. I tried generating compressed and uncompressed mbtiles with a size of 512px, the resulting files ...
0
votes
1
answer
137
views
Subset a shapefile by lat/long
I have a shapefile from this site that I am working with. I'd like to only plot the a) 30 fathom layer, and b) this layer on latitudes above 34.4. I've been able to subset only the 30 fathom layer, ...
- 19
3
votes
1
answer
257
views
R and ggplot with st_crop: map cropping does not work as wanted
I am trying to plot only a part of the world map, limited by a square with limits lon (-30, 90) and lat (30, 82). When I try to crop the map with sf_crop, it does not return the desired square when ...
- 33
1
vote
1
answer
158
views
How do I fix the hexagon distortion when plotting a 2D hexbin map of US in r?
I was trying to make a 2D hexbin map of the US in R and I followed this guide:
https://r-graph-gallery.com/328-hexbin-map-of-the-usa.html
Context: I was only able to find a couple "how to's" ...
- 11
1
vote
1
answer
257
views
Error: Can't find end of central directory : is this a zip file ? when parsing a shp file
I am working with vue3 to load a shp file.
the shp library used is https://github.com/calvinmetcalf/shapefile-js. shpjs 's version is "^5.0.1".
here is the code
<el-upload
...
- 8,168
0
votes
1
answer
223
views
Incorrect Result From st_difference
I am trying to generate a set of rings around a set of points in the sf package, and have run into an issue where for some reason st_difference returns the whole first geometry despite the two inputs ...
