8
votes
Accepted
Unable to remove GeoJSON features/layer in Leaflet
One way of solving this problem would be to declare geojson variable global outside getParkingLots function. Then layer has to be created only the first time, and from then on it just has to be ...
- 20.7k
7
votes
Accepted
Converting Pandas column with featurecollection to GeoJSON
You can use the following code. Just specify json_string_column and output file path.
import json
import pandas as pd
import geopandas as gpd
# df = YOUR DATAFRAME
json_string_column = "...
- 70.2k
6
votes
Inserting polygon as GeoJSON in PostGIS with only boundry coordinates
PostGIS has no concept of GeoJSON - except for the I/O functionality, which translates between the internal and the GeoJSON representation of geometric features. Likewise does your exemplary input not ...
- 27.2k
5
votes
'ValueError: Expected object or value' when reading GeoJSON file with Pandas
There are several things to keep in mind:
Do not forget to close the GeoJSON with ]}
There is no need to call the read_json() via pd.io.json.read_json, simply pd.read_json. Even if it is placed in ...
- 28.1k
5
votes
Accepted
What URL to use when exporting data from an ArcGIS MapServer layer to GeoJSON using ogr2ogr?
ogr2ogr -f GeoJSON test.json "https://kart.ra.no/arcgis/rest/services/Distribusjon/Kulturminner20180301/MapServer/6/query?where=1=1&outFields=*&outSR=4326&f=geojson" OGRGeoJSON
- 12.7k
5
votes
Accepted
Crossing lines when displaying multilinestring from GeoJSON in Leaflet
I managed to partly resolve the mystery of GeoJSON returned by WFS service. There are still some coordinates missing, but that's probably consequence of some configuration error on GeoServer.
First I ...
- 20.7k
5
votes
Accepted
Create layer from an array of geometries in OpenLayers?
You will need an array of features, not just geometries. Create features containing the identifying properties of each ope, then read the geometry into OpenLayers format and set it in the feature. ...
- 11.5k
4
votes
Is there any efficient way to convert GeoJSON to WKT?
I know this is old, but this question comes up highly when looking for ways to make OGR2OGR output as WKT and no one has specifically answered how to do that:
As of GDAL/OGR 1.6.0 it is possible to ...
- 291
4
votes
Accepted
What's wrong with this geojson file?
A valid GeoJSON is only in EPSG:4326. Your file is in EPSG:25830.
You can set the CRS when you export the file in QGIS.
- 8,466
4
votes
Accepted
"KeyError: 0" when calculating area of polygon using GeoPandas
The usual way to calculate area and store it as a new column (attribute) is:
df["area"] = df.area
but you might see a useful warning:
UserWarning: Geometry is in a geographic CRS. Results ...
- 41.1k
4
votes
Accepted
Labeling GeoJSON polylines in Leaflet
To position tooltip above, you have to use direction: 'top' tooltip option. To get rid of callout and for other tooltip style adjustments, just modify appropriate Leaflet CSS styles.
For example, with ...
- 20.7k
4
votes
Generating unique positive integers as id with ogr2ogr
You can also achieve it with GeoPandas using the index=None: bool parameter
If True, write index into one or more columns (for MultiIndex).
Default None writes the index into one or more columns only ...
- 28.1k
4
votes
Accepted
Generating unique positive integers as id with ogr2ogr
Note: if you have id among your properties, and you prefer to preserve it there, see this answer instead: https://gis.stackexchange.com/a/449190/191643
Using this answer to the question How to ...
4
votes
Accepted
Convert ESRI JS Graphic geometry into WKT format
You can use arcgis-to-geojson-utils library (see https://github.com/Esri/arcgis-to-geojson-utils) to convert ESRI JSON to GeoJSON, and then terraformer/wkt library (see https://github.com/terraformer-...
- 20.7k
3
votes
Loading JSON data into QGIS
For the Capital Regional District (CRD) Basemap you can use:
https://mapservices.crd.bc.ca/arcgis/rest/services/
In QGIS you can use the ArcGIS Rest Services Connection.
- 49.2k
3
votes
Accepted
Using GeoJSON as input to leaflet.motion plugin in Leaflet
All you have to do is extract line string coordinates from geoJsonData and store them in some array, let's say dataCoords, and flip coordinates while doing that, since Leaflet expects [lat, lng] ...
- 20.7k
3
votes
Accepted
Folium draw and highlight polylines with distinct colours from unique GeoJSON
Solution (works perfectly)!
It appears it is possible to achieve what I set to (see main question) within the extent of the style_function.
We can pass values to the style_function properties in a ...
3
votes
Accepted
Extract shapes and shape data from GeoTIFF using Rasterio and store as GeoJSON
shapes returns an iterable of tuples with geometry and value, you can use geopandas to parse the geometry into a valid geojson.
import geopandas as gpd
import rasterio
from rasterio import features
...
- 58.7k
3
votes
Accepted
'NameError: name 'importos' is not defined' when loading GeoJSON file QGIS
I could get the same error:
Traceback (most recent call last):
File "C:\PROGRA~1\QGIS32~1.5\apps\Python39\lib\code.py", line 90, in runcode
exec(code, self.locals)
File "<...
- 28.1k
3
votes
Accepted
Checking intersection between polygon and geometry in GeoJSON
Shapely use (x,y) in the geometries and not (y,x), therefore:
polygon_geom = Polygon(zip(lon_point_list,lat_point_list))
df1 = gpd.GeoDataFrame({'geometry':[polygon_geom]})
for geo in df["...
- 53.4k
3
votes
Accepted
Set linestring color by property value in PyQGIS
You can can set a data-defined-property for your line stroke color without iterating over every feature. I tested this on a temporary scratch layer. It should work fine for you. Select your layer as ...
- 18.3k
3
votes
Accepted
Turf area function gives different area than QGIS
Probably you are affected by this bug. turf.area uses an earth radius value different that other software like PostGIS.
There is a fix in the repo but seems not to be available in the last published ...
- 4,368
3
votes
ValueError: Invalid coordinate dimensionality
With your script the result of list_lines is a string, and you cannot create a shapely MultiLineString with strings
a) With a simple list of WKT strings (and not a string with lists):
from shapely....
- 53.4k
3
votes
Accepted
Convert a WKT string within a text file to GeoJSON using ogr2ogr or GDAL command line tools
Read some documentation https://gdal.org/drivers/vector/csv.html. Edit the text file and add a header line and enclose the WKT between double quotation marks. Notice ending comma in the header. It is ...
- 59.2k
3
votes
Accepted
How to choose a GeoJSON file and load it into OpenLayers
You could drag and drop the file as in https://openlayers.org/en/latest/examples/drag-and-drop.html
Otherwise add a file input element to your HTML:
<input type="file" id="input-file&...
- 11.5k
3
votes
Accepted
Update a Mapbox layer by zoom level when loading geojson
First you would need to flatten your data into single-geometry features as one feature has multi-geometry. Then you can dissolve your data into a second Feature Collection based on the propertyName ...
- 2,076
3
votes
Accepted
Accessing all features of vector layer (GeoJSON) in OpenLayers?
Since you are loading GeoJSON from web, operation is async, which means you have to wait till features are loaded before you try to use them. To detect when features are loaded you can use layer ...
- 20.7k
3
votes
Accepted
Update a choropleth layer by zoom level when using a GeoJSON in Mapbox
It works perfectly well, you just have to give different ids to your two GeoJSON layers:
map.addLayer({
'id': 'Ghana1',
'type': 'fill',
'source': 'Ghana',
'maxzoom': zoomThreshold,
'paint': {...
- 20.7k
3
votes
Why doesn't ogr2ogr's -nln flag have any effect on output GeoJSON in some cases?
From the GeoJSON spec: https://www.rfc-editor.org/rfc/rfc7946
6.1. Foreign Members
Members not described in this specification ("foreign members") MAY
be used in a GeoJSON document. ...
- 9,111
3
votes
Why doesn't ogr2ogr's -nln flag have any effect on output GeoJSON in some cases?
I believe that you have found a bug. If you convert GeoJSON data that has already name set, then ogr2ogr does not change the name even if the option -nln is used.
The name is set as an optional ...
- 59.2k
Only top scored, non community-wiki answers of a minimum length are eligible