Questions tagged [web-mapping]
"Web mapping is the process of designing, implementing, generating and delivering maps on the World Wide Web ..."
1,031
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Hosting webmap on Google CLoud Storage without compromising data
Does anyone know how to host a webmap (made with QGIS and Leaflet) on Google Cloud Storage publicaly, so that the HTML showing the webmap is accessible but the data driving the map is not. Bucket ...
0
votes
1
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141
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QGIS2web not updating on 3.4.5
I am using QGIS 2.18. Upon making updates to my map, the update is not showing in the export to map web page. I have updated it several times and restarted QGIS but it is not replicating my label ...
- 145
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Resizing Map width and height (avoid distortion)
I am working with OpenLayers library on React
My first question is how to avoid distortion while resizing map width and height,
The second issue is when I am changing with/height each time it ...
- 231
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364
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Geohash for polygons? [closed]
I have multiple large polygon datasets stored in PostgreSQL 12 and will publish them using GeoServer. I want to try to use geohash to possibly speed up the performance of serving the polygon layers. I ...
- 159
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How to use OpenStreetMap in webpage via OSM URL without Leaflet, OpenLayers, etc?
I want to know how I can interact with OpenStreetMap in a webpage via (only HTML, CSS, JavaScript) without Leaflet, OpenLayers, MapBox or anything like them (in backend or frontend). I am going to use ...
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865
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Cannot enable offline mode for ArcGIS Online web map in order to use in Esri Collector app
I've been trying to enable offline mode in a WebMap in order to use one Collector. I reviewed the requirements here however I enabled sync and caching on my feature layer and map layer I believe. Here ...
2
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2
answers
261
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WFS from GeoServer on OpenLayers doesn't work
I'm trying to create participatory map but I can't basically insert a WFS into my OpenLayers frame. I searched for a lot of different solutions. My WFS does work into QGIS, I also can insert WMS into ...
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How do I adapt existing responsive web site to display Leaflet maps?
My website works well on different devices but it seems that only works with images, although I would like to show other media, like Leaflet maps and videos.
Just about all pages are laid out on a ...
- 403
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133
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Create a map survey and download the result
I have a shapefile of our state boundary. I want people to be able to drop a pin and add their names to the pin as an attribute. From there I would like to download all the pins as a shapefile and ...
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0
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451
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Publishing QGIS to intranet [closed]
I have set up a basic QGIS project combining various WMS services and want to publish it to my company's intranet for everyone to use but I am a relative beginner at GIS and all the guides I have ...
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348
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How to add a vector layers to my map using OpenLayers 3?
I'm trying to add a vector layer manually to my map but i receive this error: Uncaught TypeError: b.attachEvent is not a function
the code is :
// adding data
// Define Geometries
var point = new ...
5
votes
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959
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Seeking open source GIS web server
I am a proficient GIS and Python user. I would like to ask if any open source tools exist which allow for rendering of geospatial data on a website. I would prefer to avoid tools which require in-...
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208
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Web Mercator square and not 1x2?
I can not understand why Web Mercator projection is strictly square.
In my mention:
We have a planet as a sphere.
We have 360 degrees of longitude and only 180 degrees of latitude.
That means if we ...
- 143
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759
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GeoServer cached layers and WMTS aren't working (Error!)
After restarting Tomcat I face unworking WMTS:
400: null page on path local:3000/geoserver/gwc/service/wmts?REQUEST=GetCapabilities and unworking cached layers path of GeoServer GUI.
Log:
UPD error ...
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131
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Sourcing static maps from web APIs
For a web app I want to source roadmap and satellite type maps from a web API which will be used with geometrical data from a database to generate reports. The reports would be viewed on screen or ...
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638
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Hub and spoke map
I have a bunch of addresses located in a city, there is a central location which is the hub and I'm looking to create a hub and spoke map with lines coming from the hub and going to every point on the ...
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147
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Limit custom tiles to certain extent in OpenLayers
I want to fit my custom tiles at a certain region. For example let's say i have custom tiles for a certain country (example: USA) and I am using OSM or anything at all. How do i make sure that my ...
- 229
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35
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Identifying file format of web map layer?
I am interested in extracting data from the map layer available here.
The data looks like this (I inserted linebreaks for readability):
Malta_SAR normal #LineStyle000 highlight #LineStyle001 SAR ...
- 1,469
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52
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Encode MapServer tile pixels with data values
Is it possible to encode values from raster bands into pixel output using a MapServer .map file?
More and more I'm finding that a commonly adopted method for moving geographical data for rendering ...
- 266
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0
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84
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Reprojection REST Service
Are there any open source projects that offer a reprojection service over REST? I know there are online converters available, but I want to deploy something on premises.
What I'm looking for is a ...
- 23
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41
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Multi Criteria Evaluation implemented via a website
I'm wondering if there are any websites where spatial multi-criteria evaluation can be performed by a user selecting criteria from their web browser and the result being presented as an online map.
...
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2k
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Getting spatially referenced tiles from WMTS
I have been able to download tiles from a WMTS request in .tif format using owslib in standalone python:
from owslib.wmts import WebMapTileService
wmts = WebMapTileService('wmts_url')
img = wmts....
- 253
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answers
38
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Ordnance Survey Tile Tracking Solutions?
We want to find a way to track how and how many tiles are drawn in the Ordnance Survey API (or through a different way if that is easier). As you may know, the royalty charges are per tile so we want ...
- 61
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548
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Labeling when using qgis2web
I'm having trouble getting labels to appear in a web map, both Leaflet and OpenLayers, using qgis2web. I can't get either label buffers or backgrounds to show up and even a Bold style only works in ...
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509
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Download data on click via Leaflet webmap [closed]
I am working on a webmap which will allow users to click on a portion of the globe and download associated river data. Here is my code so far.
<!DOCTYPE html>
<html>
<head>
<...
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1
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420
views
Add a Google Earth Enterprise globe (from geserver) to QGIS
I am managing Google Earth Enterprise, where I can add data to Fusion, push it to geserver and then publish it to Google Earth Enterprise clients on people's computers. But the people need to add a ...
- 509
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1
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1k
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Using Leaflet Search plugin with GeoJSON layer (L.Control.Search)
I have a map with a single GeoJSON layer that I referenced in my script (using the AJAX plugin). Now I am trying to add search functionality to the map so that the user can search for features by name....
- 353
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1
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2k
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Turf intersect point with Leaflet GeoJSON error
Leaflet and Turf. I am trying find all the layers on a Leaflet map that intersect a point when the user clicks on the map. I am using the turf library to test for this. In the console when I click on ...
- 4,255
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40
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How is browsers position altitude defined?
Looking at the docs:
https://developer.mozilla.org/en-US/docs/Web/API/Coordinates/altitude
It says "altitude above sea level in meters". Does this mean it takes into account geoid data of some kind?
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227
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How can I determine the original spatial reference system of GML coordinates when I have their WGS84 equivalent but no EPSG?
I am querying out spatial information from a SQL database that stores locations that users input on a map as GML snippets. See below for an example:
<gml:Point xmlns:gml="http://www.opengis.net/...
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109
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Mapserver weird output of REQUEST=GetCapabilities&SERVICE=WMS&VERSION=1.1.1
Once I use REQUEST=GetCapabilities&SERVICE=WMS&VERSION=1.1.1 in my browser with the mapserv I get the following:
$ cat ~/Downloads/ms
ELF>�@@!@8 @@@@��888�� �� � �� �� � TTTDDP�tdLLQ�...
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34
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Standalone Web Application Development putting GIS cordinates over layers and Visualising it [duplicate]
I am trying to understand what architecture I can use for my GIS Application. I am from a programming background, however quite inexperienced with GIS and Web development, yet the task is to create a ...
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55
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Downloading or caching web based map service for faster access?
The Western Australia Department of Mine and Petroleum allows access to one of their online systems called Tengraph Web with which I can view tenements, major infrastructure, and topography for the ...
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79
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ArcGIS Portal - Click to add a marker and get coordinates
How would this be best approached in ArcGIS Online and/or Portal?
A user needs to click a point on a web map to identify a work location.
Clicking the map adds a marker and also stores the XY ...
2
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1
answer
282
views
Best approach to process thousands of TIFF files
I have a data source with a folder pyramid that contains several thousands of GeoTIFF files, about 70Mb each. I would like to process these so that I can display the map overlays on a OpenLayers web ...
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2
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Get GeoJSON Features using Mapbox?
I'm using Mapbox to create webmapping, I want to get GeoJSON Features. I tried map.queryRenderedFeatures but it returns array empty.
there are my code:
map.on('load', function(e) {
map.addSource("...
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1
answer
1k
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How to use hyperlink for image popup in web map based on QGIS 3.4.3?
I have a point shapefile layer, that I added into it a hyperlinks row. Each hyperlink is for a image, all in me dropbox.
When I identify a point, I see the selected image.
However, when I export it to ...
- 2,777
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611
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Leaflet map shows no markers for GeoJSON
Following the example below I try to add an external GeoJSON to my Leaflet map, but its markers don't appear on the map. I use this file GeoJson. Any explanation?
https://maptimeboston.github.io/...
- 3,396
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336
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Real time changing status of a point, web mapping [closed]
I’m new to web mapping and developing and I try to make a web map with points. The points are bank ATMs. The points will change color depending on their condition. There will be three different colors ...
- 3,396
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340
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Set extent in a webmap Esri
I'm creating a storymap from a developers tutorial I found on Esri. The point of the tutorial is to insert an additional reference map. Everything is working well but I want the extent to closely ...
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533
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Mapserver not displaying a raster properly
I have a 32bit floating point raster containing only five values (-2, -1, 0, 1, 2 + -999000000 for noData don't ask me why, it was delivered to me), no compression, projected (EPSG:3857). I am using ...
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GDALWARP cuts off right edge of image?
I'm reprojecting GFS GRIB files to EPSG:3857 using gdalwarp. Resulting file get little bit shorter to the right so when I zoom in from zoom level 5 and higher, I can see vertical line with missing ...
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3
answers
2k
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Using Wordpress with GIS? [closed]
I am building a community-run map of neighbourhood stories that should feature photos, text, audio and video recordings.
Ideally, I hoped I could use a powerful and relatively user-friendly CMS like ...
- 515
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59
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How to create service url to get demographic data and then tie up the demographic data with zip code?
I want to create a Map tool like https://www.eddmexperts.com/eddm-map-tool. This site is using ArcGIS map service but I did not understand where I can get the service URL they are using to get ...
4
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1
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239
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Automating ArcGIS Online Shortlist Story Map description customization?
Is it possible to automate the descriptions under each image/event in the Shortlist Story Map?
I want the word "Year:" to appear before every yyyy.
I want this type of label and colon to be bold and ...
- 41
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98
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Congressional/Legislative Member Data Set [closed]
I am working on a web map of congressional and legislative districts. I am able to find the boundary lines but not up to date data on the representatives per legislative district.
Anyone know of ...
- 9
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2
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Set border width and color in Mapbox GL
I'm working on an application based on Mapbox GL, I need to give to the user the opportunity to set the width and the color of the borders of polygons but I can't find the right GeoJSON proprieties to ...
- 113
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104
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Pros and Cons on loading vector data from ESRI Shapefile and GeoServer using OpenLayers 5 [closed]
I am developing a web map application to show the vector data on top of OpenStreetMap using the open source technologies such as OpenLayers v5.2.0, but am a bit confused to take a decision in what ...
- 1,021
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101
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How to use CARTO map visualization in Odyssey.js sandbox
I have a story map in Odyssey's sandbox GUI. I want to use a visualization I have in CARTO as a base map for this map. How can I find my viz key? All the documentation seems to refer to an option that ...
- 163
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3
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2k
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Find out ESRI REST URL for web map which is hiding it
I would like to extract the pipeline geometries from https://www.arcgis.com/home/webmap/viewer.html?webmap=a00c3b5cee4e4fe0b238b5e05ed80204
It shows the existing gas & oil pipelines crossing ...