Questions tagged [geojson]
GeoJSON is a geospatial data interchange format based on JavaScript Object Notation (JSON)
1,746
questions
0
votes
0answers
12 views
TurfJS like library in Go
I am curious if anybody here has recommendations for a library very much like turfJS in terms of being able to calculate intersections, pointWithinPolygon and similar functions in a language other ...
0
votes
1answer
13 views
Overpass API returns points instead of polygons
I'm able to retrieve geojson using the following call to the Overpass API for boroughs in London:
import overpass
api = overpass.API()
response = api.get('relation(1811626);>;out;')
However the ...
0
votes
0answers
15 views
Display multiple polygons with Leaflet? [on hold]
I need to display about 200,000 polygons stored in the PostGIS database.
In the back end, I'm using net core 2.2 to create APIs and Entity Framework for queries in a PostGIS. In frontend, I'm using ...
0
votes
0answers
38 views
Implementing “conformal mapping” in OpenLayers?
I want to preserve shape of objects, so how do I implement "conformal mapping" in openlayers 4.6.5?
My current objects:
I have several geoJSON objects (WGS84) around the globe in long/lat with a ...
-1
votes
0answers
21 views
Seeking free GeoJSON APIs for nation shapes? [on hold]
I am looking for some API endpoints that return GeoJSON shapes for each nation.
Also, any other lists of APIs are sought.
I found this link for state shapes in the Mapbox docs, so I am hopeful ...
0
votes
1answer
17 views
3D Multipatch feature class to 3D GeoJSON in ArcGIS Pro?
I have generated some building blocks in CityEngine and exported them as "Multipatch feature class" in GeoDataBase, then I imported them into ArcGIS Pro and tried to convert them into 3D GeoJSON ...
1
vote
1answer
39 views
Angular - How to visualize GeoJSON on Google Maps
I am using @agm/core for visualization GeoJSON on Google Maps.
But I can't display my buildings on Google Maps.
I think the problem is the geometry that is represented as multiple аrrays.
I used FME ...
1
vote
1answer
24 views
Transforming a GeoPackage table's geometry column into GeoJSON?
I have a GeoPackage that is downloaded to client devices for a mobile app. I need the clients to query the GeoPackage to retrieve a GeoJSON representation of the geom column. I'm familiar with ...
0
votes
0answers
22 views
Leaflet: Unable to filter GeoJSON beyond the `properties` element level
I have the following code which displays a Layer in my Leaflet map from some remote GeoJSON:
// Create Layer: Airspace
var featuresUTMAirspace= L.geoJson(dataGuardianUTM, {
filter: FuncAirspace,
...
0
votes
0answers
24 views
When re-saving a GeoJSON file to a shapefile, the .dbf significantly increases in size
When re-saving a GeoJSON file to a shapefile, the .dbf significantly increases in size to the point where the file size becomes unmanageable.
For example, I re-saved a 250 MB GeoJSON file to ...
0
votes
1answer
15 views
Linked popup image in GeoJSON file
Developing the issue solved in this post:
Trying to pop up image in GeoJSON file?
I would like to have each GeoJSON image thumbnail possible to open in larger window.
I was trying to connect with ...
0
votes
0answers
36 views
Creating radius map with conditional overlap colors on Google Maps?
Here is what I need to do:
Have a webpage with a zoomable map. We currently use google maps api, but willing to try others.
I have around 1000 lat/lon points. For each point, I would like to create a ...
1
vote
1answer
32 views
Trying to pop up image in GeoJSON file?
I am trying to put an image inside the geoJSON file.
I know, that Geojson works as string and I cannot input the image directly, however I found some stuff, like this below:
http://www....
2
votes
0answers
39 views
Shapefile or GeoJSON? [closed]
I'm interested in understanding the relative merits of using GeoJSON or shapefile formats for handling geo-spatial data, particularly in an open-source, Python (CKAN project), web-development context.
...
1
vote
0answers
39 views
Writing more than 1000 rows with arcpy.da.InsertCursor? [closed]
I have a GeoJSON which I'm able to successfully covert to a shapefile via the following process: using arcpy.asShape to find geometry, and inserting this geometry as new fields using cursor insertRow)....
0
votes
0answers
5 views
GeoJSON opening hyperlink to local file in the local aplication instead of browser
I have got a GeoJSON file with link to the local file, which works.
How to write hyperlinks to local files in GeoJSON properties?
Continuing the question above I would like to have this link sorted ...
2
votes
1answer
42 views
How to write hyperlinks to local files in GeoJSON properties?
I am wondering how to make a hyperlink from GeoJSON file properties to the local drive file.
I found two options here:
Clickable hyperlink from GeoJSON field in feature
this option refers to a whole ....
1
vote
1answer
18 views
Iterating through sub-element `sections` of GeoJSON on a Leaflet map?
I have the following code which I use to display a marker on my map with a popup containing the feature.properties.name element from my GeoJSON:
var featuresUTMGroundHazards = L.geoJson(...
1
vote
1answer
20 views
Cast 3D geometry as 2D for ogr2ogr GeoJSON
I'm trying to take a shapefile that can be downloaded here (specifically the shapefile titled PVS_19_v1_vtd_21031.shp), convert it from EPSG:4269 to EPSG:3857, and output the GeoJSON into CSV with ...
0
votes
0answers
27 views
Leaflet GeoJSON legend with custom icons
I have been developed a legend, details are here:
Leaflet GeoJSON map legend
Now I am wondering how to take into account my custom icons, set for GeoJSON file.
var myIcon = L.icon({
iconUrl: '...
1
vote
0answers
30 views
Using ArcPy.AsShape results and converting them to feature class?
I have a GeoJSON that I'm trying to convert to a feature class or shapefile using ArcPy.
The original GeoJSON is taken from a web link here:
geojson
Here's a sample of the GeoJSON:
{ "type": "...
0
votes
2answers
34 views
Leaflet GeoJSON map legend
I am struggling with creation of the map legend adequate to my GeoJSON stylization.
The code looks like below:
var geojsonMarkerOptions = {
radius: 8,
fillColor: "#ff7800",
color: "#000",
weight: 1,
...
1
vote
1answer
26 views
Animation does not work GeoJSON date fields in CARTO VL
In CARTO VL linear function expects a date or numeric field as its first argument. But when the data source is a GeoJSON, date fields are stored as categorical/strings and it returns an error like ...
0
votes
0answers
14 views
Convert an Entity to GeoJSON with Cesium
I know there is a way to load entities from a GeoJSON using GeoJsonDataSource but is there any way to do the oposite: get any entity as a GeoJSON representation?
My goal is to use TurfJS with Cesium ...
1
vote
1answer
27 views
Leaflet load JSON data
Does my code have problem? Because if I run in Visual Studio, it doesn't show error, but the file didn't load on my map.
I put the JSON file and HTML on my desktop.
This is my code :
...
1
vote
0answers
14 views
Convert polygon co-ordinates to GeoJSON using JavaScript [closed]
I need to convert the below polygon to a GeoJSON object,
"Polygon":"146.90805846452713 -42.942663073539734, 147.01517516374588 -42.87627762556076, 147.15525084733963 -42.745309352874756, 147....
1
vote
1answer
30 views
Unable to use fillColor values from GeoJSON with Leaflet
I have a web page which fetches some remote GeoJSON and displays a combination of marker points, polygons and lines on my map.
Within that JSON is the fillColor, fillOpacity, etc that I wish to use ...
0
votes
1answer
39 views
GeoJSON search box for multiple layers
I am wondering how to make the GeoJSON search more efficient. I would like to get the search result from more than 1 layer in GeoJSON.
My code is (I attached one of two GeoJSON examples):
var test = ...
0
votes
1answer
33 views
Search box for GeoJSON in Leaflet
I have been struggling with adding a search box for GeoJSON stuff, similar to COntrol.geocoder in Leaflet.
I used the advice under this post:
Adding one search box for multiple GeoJSON polygon layers?...
1
vote
1answer
54 views
Load polygon JSON to Leaflet
I want my JSON data with URL can load on the map, and it is a polygon data.
I don't know what the problem with my code.
This is my code:
<html lang="en-US" xmlns="http://www.w3.org/1999/xhtml">...
1
vote
1answer
27 views
Extract the coordinates from a GeoJSON file that displays point on my Map in OpenLayers 4
Well I have this GeoJSON file :
{"type": "FeatureCollection", "features": [{"id": "1", "type": "Feature", "geometry":{"type":"Point","coordinates":[-5.8039556,35.7903036]},"properties": {"gid":"1","...
1
vote
1answer
29 views
OpenLayers 5: To display the label for a point
In my project there are two GeoJSON point layer, both has the same attribute 'name'. I would like to use this attribute for labeling all points.
I've found this similar question but it is for ...
0
votes
2answers
31 views
Leaflet GeoJSON popup marker customization
I would like to customize leaflet .bindPoPup geoJSON marker.
I found some solutions, although I would like to use my existing one.
Basically the operation leads to merge two functions as per below:
...
0
votes
0answers
9 views
Showing image when clicking on Point in OpenLayers Map? [duplicate]
I have this map:
I want to show an image when I click on a point. Every point has its own picture.
I am new to OpenLayers.
How can i do that after getting the data in GeoJSON?
1
vote
1answer
43 views
Assign the SRID to a serialized GeoJSON
I've created a simple model like this:
class AddPoint(models.Model):
name = models.CharField(max_length=100)
geom = geomodels.PointField(srid=3857)
def __str__(self):
return self....
1
vote
2answers
33 views
Leaflet GEOJson marker pins are not a Layer?
I currently have the following code which is used to display a series of GEOJson marker pins on a LeafletJS 1.5.1 map and it also displays a KML layer which can be toggled on and off using a checkbox.
...
2
votes
0answers
60 views
Esri mapview USGS earthquake trigger popup from outside of map
I am trying to show some recent earthquake information in Esri maps using USGS earthquake API data. I am able to fetch the list from API data and also I got the map with those listed information ...
1
vote
1answer
31 views
GeoServer query with GeoJSON
I'm trying to serve a view of my table after passing a GeoJSON polygon.
Te idea is get all the points inside my polygon passed as GeoJSON.
For this, I've created new SQL view, and a query:
select ...
1
vote
1answer
33 views
Highlighting GeoJSON components based on common feature properties
I have a GeoJSON map. It's a map of a country, which is made up of states, which are in turn made up of sub-state regions.
I can create a Leaflet map where I can highlight (in this case 'orange') the ...
0
votes
1answer
18 views
Calculate the area of a map using gdalinfo
I'm using gdalinfo to get some information out of a map, and want to use it to calculate the area represented by the map. I'm currently doing it (when the units are given in metres), by multiplying ...
1
vote
2answers
82 views
Add popup with GeoJSON data
I want to display popup with the data item, such as: name, coordinates, stationID, Attribute.
But my code has some problem that can't run.
<html lang="en-US" xmlns="http://www.w3.org/1999/xhtml"&...
3
votes
3answers
57 views
How to convert an OSM relation to a list of lat/lng points?
I would like a convert a relation (e.g. https://openstreetmap.org/relation/2851613) to a list of coordinates that can be displayed on a map, potentially using geojson. I ported over this converter ...
2
votes
1answer
78 views
Show points (layer) from PostgreSQL database on OpenLayers map
I have this code, I want to load a collection of points stored in a table in PostgreSQL database, I retreive the GeoJSON format succesfully, but the points never show up on the map!
The three files ...
0
votes
0answers
41 views
GeoJSON from react-leaflet doesn't render the layer over the map [duplicate]
I have a GeoServer running on my localhost also I have a react app which consumes a WFS service to get a GeoJSON data to render as a layer over the map.
These are my dependencies on my package.json
"...
0
votes
0answers
42 views
Transforming Alaska and Hawaii to be next to USA with TurfJS?
I'm working on an app that contains a map; right now, the map just includes the Continental US, but it would be great if Alaska and Hawaii could be included as well.
So far, I've found shapefiles ...
1
vote
1answer
21 views
Adding data from KML/shapefile/GeoJSON to OSM nodes
I have data of streets which is marked with the osm way/node ids. I would like to add speed limit data which is available in KML, shapefile, or GeoJSON to these OSM wayids (OSM wayid with start node ...
0
votes
0answers
11 views
showing GeoJSON result on googlemap [duplicate]
I want to get some point (in Geometry type) from my sql database with AJAX and show them on googlemap
my table name is location_flat which has a column named position conatained my geometry points.
...
2
votes
1answer
77 views
Import more than one GeoJSON into Leaflet map?
I've searched far and wide and tried a number of different options but I cannot get more than one GeoJSON into my Leaflet web app. I can get one, and once I try anything else, the map itself will go ...
0
votes
1answer
45 views
Showing GeoJSON result on Google Maps [closed]
I have some points result query in MySQL database which is GeoJSON and I want to show these points on a Google map. I need to get this result with AJAX and deliver them to Google Maps. Can anybody ...
1
vote
1answer
42 views
Transform HTML area to GeoJSON
I have this file http://www.meteofrance.com/mf3-rpc-portlet/js/datas/zones_AVDEPT73.json where the "zone" field is put in an area HTML element (so does "shape").
I have a little script that takes the ...
