Questions tagged [web-mapping]

"Web mapping is the process of designing, implementing, generating and delivering maps on the World Wide Web ..."

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25 views

Are client-side raster colour-ramps possible?

For web portals visualising single-band raster information (such as bathymetry or elevation), is it possible nowadays to have a colour map applied to the data in the browser (instead of server-side)? ...
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14 views

Extracting XY coordinates from dynamic web map

I am trying to extract XY coordinates/georeference points from a dynamic web map (specifically electric vehicle charging stations). I basically want to download/extract the location of the charging ...
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16 views

List QGIS projects and their layers as a dropdown in a web page

I have a goal of providing a dropdown on a web page in a React app that lists all QGIS projects on a remote server. I assume that server would be Postgresql/Postgis. Select one of them and you get a ...
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22 views

Web-based map performing user query

I have roads belonging to a region and their nodes. I will run the shortest path algorithm (A* )in this dataset. I want to make a web-based map that contains this data. In this map, users will be able ...
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2answers
74 views

Exporting QGIS project containing many points with qgis2web: reduce loading time

What I have: QGIS 3.18 on Win 10 containing a project with: OpenStreetMap basemap Point layer (Geopackage, 5.1 MB), representing centroids of buildings of a city Point layer set to scale based ...
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29 views

Export spatial data from Web Map

I am trying to get the polygon data from the following leaflet web map http://www.cityfibre.com/rollout/. I am not really sure what kind of format I should be looking for (geojson, xml, etc..) but I ...
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1answer
118 views

What is the simplest way to host a qgis2web export?

I am new to hosting web maps and would like to know how I can run a qgis2web export and embed a webmap url to sharepoint or share with others. How can this be done open source?
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45 views

Error loading dojo file locally: “Loading failed for the <script> with source …”

I'm attempting to add ArcGIS maps to a website that's on a restricted network (and therefore needs to work offline). I've been trying to get the ArcGIS ESRI maps running offline, but I'm not sure how ...
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12 views

Capture any embedded map larger than screen

I use the various map portals on the daily basis, like below: and the biggest problem is, that my capture is restricted to the screen, being precisely to the area, where the map is embedded, as you ...
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0answers
17 views

Is there an easy way to style KML files on a graduated colour scale based on field values when uploading to a Google Map?

I am creating a Google Map which includes one polygon layer of census output areas and one point layer. Because the polygon layer is so large and there are limitations on the number and size of layers ...
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1answer
176 views

Passing a Python list of coordinates to add as markers to web map (Flask)

In my flask GIS app, I am passing my web map a list of coordinates from a route in my Python backend, which works as I expect it to. When I print the list it looks like this. [['53.792614', '-1.789202'...
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1answer
62 views

How can I share folium map on the web?

I have created a folium map with markers and popups in jupyter notebook and saved it as map.html I am looking for a way to share this map with others or host on the web, such that the markers and ...
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0answers
47 views

Building version control system for website, like the one used on Wikipedia but for geospatial data?

I'm working on a website permitting to display and modify geospatial data. So far, I'm using this solution: My data is stored in PostgreSQL with the extension PostGIS It is posted in GeoServer My ...
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39 views

Showing different popups for different layers?

I have multiple layers that have different pieces of information. I have radio buttons for selecting layers and when layers selected I want to show different popups which different information for ...
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1answer
38 views

Fetch point data from image WMS

Based on the previous questions I asked, I got a way to fetch the clicked point information, but I want the exact value of gray_index, but as you can see the answer is text or HTML. In the image below,...
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20 views

How can I fetch Coverage Band Details from GeoServer in OpenLayers? [duplicate]

I want to display the gray index value in the image above in GeoServer on my map when clicked At the bottom of the example there is (layer preview-> openlayers) I want something like this
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0answers
56 views

Get pixel value of ImageWMS that has geotiff format [closed]

I have layer (ImageWMS that has GeoTIFF format) and also OSM or another for my baselayer. According to https://openlayers.org/en/latest/examples/disable-image-smoothing.html I should get pixel[0] and ...
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44 views

Fetching JSON data from URL

Here is my code and (console.log(feature)) gives me URL that has data in console. How can I fetch data and use it as var? map.on('singleclick', function(evt) { var view = map.getView(); var ...
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1answer
39 views

Web-GIS cannot display WMS data because of CORS header ‘Access-Control-Allow-Origin’ missing

I have an OpenLayers application in a secured connection (with apache2 and port 443) in a machine A and I want to display data from a GeoServer WMS which it exists in a machine B with insecured ...
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0answers
31 views

Showing raster map pixel's information(pixel value) when clicked on the map in OpenLayers? [duplicate]

Here is my raster map code and I want see pixel information like pixel value from it when I click on the map: const UnTiled = new ol.layer.Image({ opacity:0.9, source: new ol.source.ImageWMS({ ...
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1answer
32 views

Coordinate values ​are not displayed correctly in OpenLayers

I'm trying to display coordinates of map click event. I do not think the coordinates are displayed correctly. The two numbers shown to me are (3889586.1245487547, 6296722.285457358). Where do you ...
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0answers
12 views

Updating ESRI Hosted Feature Layer is retaining old versions of the layer

The problem is that there should only be one Layer included. Instead there are 4 with the same name. I uploaded a zipped shapefile to ArcGIS Online and created a feature service out of it for creating ...
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1answer
28 views

Does the number of decimal places in coordinates affect the speed of rendering of the features on a Leaflet map?

I am trying to improve the performance of a webpage that renders hundreds of points on a Leaflet map. I noticed that the coordinates of these points are saved and retrieved with unnecessary accuracy (...
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1answer
54 views

Image not visible in a webmap from QGIS2WEB

I have got a map created in QGIS where there are some pictures linked to a different polylines. Those pictures are stored in an image hosting, therefore I got a field in the polyline´s attribute table ...
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1answer
111 views

How can I add WFS using Leaflet Control Tree?

How do I add WFS when using the Leaflet.Control.Tree by jjimenezshaw plugin? Without using the control tree plugins, I can to make the call from Geoserver through Ajax and display my data on the map ...
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0answers
51 views

Disable popup on double click event on Mapbox GL map

How to disable 'show popup' on 'double click' (show popup only on 'single click' event) event without disabling 'zoom in' (or 'zoom out' (with Shift button))? Mapbox GL jsfiddle example
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1answer
94 views

Leaflet GeoJSON filters not working

I've been struggling to get map filters to work on my Leaflet map. I've got minimal JavaScript or Leaflet knowledge so where I have got to now has been a struggle. I'm essentially trying to do the ...
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1answer
54 views

Leaflet geolocation alternative for if access is denied [closed]

I have the following that prompts the user to give location access. On granting permission the user's location is shown and the map loads. I'm trying to find a solution for if the user accidentally ...
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1answer
38 views

Leaflet Locate current location

I'm new to Leaflet and anything web related. I have got the following map working which asks for your location and changes the map view to that location. That is great but then the map continues to ...
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1answer
79 views

On clicking over the desired polygon using getFeatureInfoUrl of openlayers 6, Why the tile layer (WMS) is showing values of the adjacent polygon?

window.onload = init; function init(){ //Geoserver dynamic layer // wmsSource = indialayersource var india_dist_rainfall_layer_source = new ol.source.TileWMS({ url: "http:/...
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1answer
35 views

How to call/insert legend created by GetLegendGraphic request url of GeoServer on web-page?

I have followed the steps as mentioned on in the GeoServer Documentation for GetLegendGraphic Now as I click over it, it gives out an image of the legend on the next web-page and I have added this in ...
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1answer
49 views

Legends not appearing in GeoServer Layer

I have added a new style in GeoServer. As I am seeing the preview of legend while creating the style, it is appearing. But when I am applying the same to the GeoServer layer, it is not appearing in ...
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1answer
77 views

Is it possible to, Click to zoom in and switch to vector layer beneath, on webpage to show GeoServer WMS layers via OpenLayers?

I have 2 vector layers in GeoServer First is a district layer Second is a state layer When I make a Layer group of these layers in the GeoServer and showing that layer group on the web-page, using ...
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0answers
19 views

Automate publishing to Map Server

I recently been using FME to publish feature layers but have now had to move to map image layers because of the issue around grouping limitations with feature layers. I am now trying to work out how ...
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0answers
26 views

How to add my WFS data to ArcGIS operations dashboard?

I'm trying to build an operations dashboard in ArcGIS Online. After adding my WFS layer to a web map I had to add some custom parameters to actually show the real-time data (points and metadata). When ...
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3answers
106 views

GeoServer not responding to OpenLayers 6 GetFeature request, after enabling CORS filter in the file located at webapps/geoserver/WEB-INF/web.xml

instructional URL/link of enabling CORS for GeoServer File location/Directory As given on the website, I uncommented my the filter in web.xml file to enable CORS, but now I can not access the ...
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1answer
29 views

Creating geospatial app for both iOS and Android [closed]

Does anyone have any experience or solid foundation on how to build geospatial apps that can be utilized through app stores? Specially, I am searching for a way to present simple, publicly available ...
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0answers
12 views

Map Lagging on Drag and Drop Movement

am working on Angular 11 project having arcgis javascript version 4.17 when doing Drag and Drop on the map it self by the mouse, there is a kind of lagging that happens on it. the movement is not ...
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0answers
40 views

Mapcache installation in Red Hat Linux throws RHPG error when building from the source

I am trying to install MapCache in Red Hat linux 8 by building from the source. I am following the tutorial present in https://mapserver.org/mapcache/install.html. But when I run make command the ...
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0answers
25 views

GeoServer and OpenLayers 3

I have developed a web app using GeoServer, PostGIS and OpenLayers3 in localhost. This app is working in localhost and now I would like to publish this website in public to collect data. Does anyone ...
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1answer
82 views

What is the reason to use GeoServer to provide access to vector data? [duplicate]

I am building a website that will present spatial data (Leaflet) and I plan to include functionalities like: add, move, delete features (i.e. by clicking on the map or on the feature) I would like to ...
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0answers
35 views

Way to turn on a layer, and turn off the rest of the desired layers with a button or switch in Experience Builder?

I am attempting to publish a map in Experience Builder that has indoor floorplans of buildings. Would anyone know of a way to design a button or a switch that could toggle on a layer, and then turn ...
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1answer
144 views

Creating multiple points on Mapbox Isochrone map

Is it possible to create multiple points on an isochrone map in Mapbox? This is the documentation for one of their maps with one point: https://docs.mapbox.com/help/tutorials/get-started-isochrone-api/...
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0answers
22 views

ArcGIS for Server: Get map service cache scales programmatically

I am trying to write a script to build tile caches for a bunch of map services. My issues is that to run arcpy.ManageMapServerCacheTiles_server() I need to pass a list explicitly stating scales at ...
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0answers
72 views

How to get Cog(in AWS S3) tile url?

I have one raster file (Cloud Optimized Geotiff) in AWS S3 bucket. And I want to mapping as a raster tile source using Mapbox GL JS. How can I get the my Cog's tile url..? Should I use tile server?? ...
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0answers
431 views

Cloud-Optimized GeoTIFF overlay on Leaflet?

I want to load external Cloud-Optimized GeoTIFF files onto a Leaflet map as overlays, and manipulate the colors based on user input. I've found examples online that appear to to this exact thing, but ...
2
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2answers
188 views

Tools for drawing weather-rose-overlays on maps/locations [closed]

I need to create a map with points-of-interest. My initial idea is to "build" wind-roses using KML file and Openlayers: https://openlayers.org/en/latest/examples/kml.html. This seem a bit ...
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1answer
135 views

GeoServer+PostGIS performance for very detailed data

I have a layer on GeoServer, taking very detailed data from a PostGIS table. I can see the size of the table is quite big Size 977MB, External Size 977Mb becoming the performance really low. GIST ...
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0answers
63 views

Using Mapproxy parameters as input to Mapnik data source

I'm using a structure of Mapproxy and Mapnik to render raster data through a WMS. I was able to connect the Mapnik source on Mapproxy and render a unique file from my XML Mapnik data source ...
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1answer
43 views

Cannot display images from geoserver into the web application

I cannot load any map in the web application Arches web app (https://arches.readthedocs.io/en/stable/) I am working with, at the beginning I thought it was problem with the ports so I opened some ...

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