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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votes
1answer
495 views

Reusing leaflet map elements in custom functions in Shiny/R

I have an application that reuses several leaflet elements, so I'm trying to build functions to streamline my code. All of my logical attempts failed, so I utilized an example I was familiar with ...
3
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1answer
3k views

Forming queries with node.js, PostGIS and GeoServer?

I am not sure If I got the overall web-mapping architecture right. I can easily find tutorials about each part, but nothing on how to connect them. I have openlayers in the front-end, node.js as a ...
0
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1answer
209 views

Passing user-defined feature selection (by location) into geoprocessing widget in web app

I am creating a web based map with a custom script tool that is published as a geoprocessing service. I am using app builder to set up a geoprocessing widget, but am unsure of how to include a user ...
1
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1answer
4k views

Folium Heat Maps

I am trying to replicate the following heatmap from this link. Seems simple, but my html output is just a tile map with none of the data I'm trying to represent. Here's what my csv data looks like ...
0
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0answers
204 views

Overwriting Feature Service with additional Layer in AGOL

I have a feature service published, new data daily which is in the form of an additional layer. I use the feature service in a webmap, but after the service is overwritten the additional layer is not ...
1
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0answers
108 views

Is there any labeling (by scale) rule of thumb in Cartography?

I did some research about Map labeling and most of them are about font, spacing, etc. I am just wondering is there any rule of thumb of labeling in terms of map scale. For instance, in Google Maps ...
1
vote
1answer
205 views

Unable to Generate Popup with Leaflet From Geoserver

I've been learning to use GeoServer. I found a tutorial: https://www.e-education.psu.edu/geog585/node/765. I followed all of the steps, however the Leaflet map does not generate a popup even when I go ...
0
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0answers
378 views

Get the point coordinates of images of an interactive web map?

I want to parse this web map for the point coordinates of the displayed icons: https://www.mercedes-benz.de/passengercars/mercedes-benz-cars/dealer-locator.html The HTML class of the items is "...
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0answers
106 views

Web page that dynamically draws contours at user specified elevation?

How might I setup a web page that will draw dynamically contours and/or hypsometric tints at a user specified starting elevation and/or interval? Example scenario: flood hazard modelling. The web ...
0
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1answer
55 views

Labels with halos become faded and transparent in CMV when using an aerial image

I am using CMV to create a web map but when I use esri's world imagery or another image service as my base map, my labels (only with halos - Aerial 10pt with 2pt halo) become faded and transparent - ...
0
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1answer
2k views

Line break in a Popup box in Leaflet

How can I put a line break in the popup window in the following statement? I am trying \n and but its not working. for lt, ln, el, plc in zip(lat, lon, elev, pl): fga.add_child(folium.Marker(...
2
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0answers
388 views

Need to Add/Remove .png Legend with Leaflet Layers Control?

Supporting Links Website Location: http://bit.ly/2fXCiTH .JS File Location: http://bit.ly/2g56W0U Trying to accomplish I would like to have a specific .png legend associated to each individual ...
6
votes
1answer
152 views

Appropriate False return statement?

I wanted the following Code to show green icons when the value is < 6.0 and nothing shown when it is >= 6.0 But it is returning Red icons for values >= 6.0 as in screenshot attached. What should be ...
3
votes
1answer
1k views

Change the colors of polygons on a choropleth map with leaflet

I have data from different countries (=polygons) from 1990 to 2012 and depending on the data value I want to map the changes with a timeline enabling the user to visualize the changes (with colors) ...
0
votes
1answer
334 views

How change legend icons size on leaflet map generated using QGIS2WEB plugin?

I need to know how to change size of icons from the leaflet web map legend generated using qgis2web plugin. Is there any icon size information inside code which I can change to larger number? I have ...
5
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3answers
526 views

leaflet problems displaying postgis table geoserver wms

I have a published postgis county table on geoserver. In the layer preview it looks like this in my very simple JS code <!DOCTYPE html> <html> <head> <meta ...
-3
votes
1answer
613 views

Creating GUI for an arcgis project with python [closed]

I am new to Python and been putting my hands around ArcGIS for a while. So I am wondering if it is possible to create a GUI for an ArcGIS project I did and compile it to a desktop application or web ...
0
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0answers
338 views

How to export OSM maps given the bounds?

I have a map application where I use all kinds of OSM maps as background. http://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png http://{a-c}.tile.opencyclemap.org/cycle/{z}/{x}/{y}.png http://{a-c}....
1
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0answers
88 views

Why does Mapbox Studio deform my polygon layers?

I'm uploading perfect squares to Mapbox Studio, either .shp or .geojson, and the resulting layers are stretched or otherwise deformed. Here are my polygons as seen in QGIS, EPSG:3857. They are all 50*...
1
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1answer
663 views

Simple Website to show WMS with Openlayers

i want a simple website to show a WMS and want to use Openlayers. I started with Quick Start from Openlayers newest version, but got errors. So i took an old workspace (openlayers version 2) and ...
2
votes
1answer
312 views

QGIS2web OL3 layer search issue

Please see my example OL3 map here of threatened ecosystems in South Africa: https://storage.googleapis.com/expanded-line-7365/DM%20selector%20%20with%20layer%20(demo)/index.html Please use the ...
2
votes
2answers
801 views

Making Key Navigation Work in Openlayers 4 (ES6)

So this last weekend, I decided to re-write my GIS portal, I'm using the new DotNet Core C# stuff, and the Aurelia (Aurelia.io) web application framework. Everything works perfectly, except for one ...
1
vote
1answer
130 views

Mercator - create uniformly distributed dots over map

I have a map in Mercator projection. I know coordinates of corners. I want to render uniformly distributed dots to map. for (float latDeg = startLatDeg; latDeg <= endLatDeg; latDeg += stepLatDeg){ ...
3
votes
1answer
224 views

Mantain text style Qgis2web OL3

I created a map using Qgis with some labels on it. I stylized the label text making it bold and changing the font size, but when I export the map using OL3, all the changes were lost. There is a way ...
1
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0answers
78 views

Webgis with leaflet or … with another simple solution [closed]

I need to create a static webgis (no connection with db!) to display my interferometric points on a map using Leaflet or similar tools. My points are in geojson but: How can load these points on a ...
1
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2answers
656 views

Downloading Map on Collector for ArcGIS

I know this will sound like a foolish question once I find out what I'm doing wrong but here goes: I had downloaded an outdated version of my data collection map onto Collector, but I need to switch ...
1
vote
1answer
571 views

Why can't I load my basemap from the arcgis rest services using leaflet?

This code is not working ! Please help !!! Why can't I load my basemap from the arcgis rest services using leaflet ? do I need to include"the esri-leaflet" package as well to use arcgis rest services ...
3
votes
2answers
525 views

How to create a web-based GIS that can be queried by multiple users? [closed]

As part of my position, we're required to randomly select townships in our state, select forest, wetland, or grasslands and then throw random points into those habitats to create site for plant and ...
1
vote
1answer
70 views

I'd like to see where commercial districts are, using color-coding. Is there any free map website, other than Google Maps, which can help me? [closed]

Background Google Maps nowadays shows "areas of interest" in pale orange. (Source.) As far as I can tell, "areas of interest" are basically just high-density commercial districts. I think it makes ...
1
vote
1answer
200 views

GeoServer GeoWebCache caching wrong resolution tiles from USGS WMS

I have a simple OpenLayers 3 map with a topo layer that is cascaded from a USGS WMS through my GeoServer / GeoWebCache system. The tile zoom level resolution is correct when the GeoWebCache is turned ...
2
votes
2answers
3k views

Images as markers for geojson

I have a geojson file with the location of some universities. This is the map. The logos are stored in a folder named img Here are the logos. Now I want to replace the default markers with logo for ...
1
vote
1answer
402 views

d3 map rendering sideways

I have a simple d3 map displaying data from Canada in topojson format, but the entire map is rendering sideways. I have been playing with the rotation parameters but I can't seem to get it just right....
2
votes
0answers
293 views

Appropriate web-server framework for serving slices of an interactive Leaflet vector layer from a large PostGIS table?

I'm trying to develop a web map with a clickable chloropleth layer of streets in a large city. There are approximately 40k polylines in this layer, producing a 21MB GeoJSON. This is too much data to ...
1
vote
0answers
48 views

qgistoweb search attributes

Is it possible to query features based on attributes from the client side of qgistoweb? How can this be achieved? I have a single data set that I want to serve over the web, while allowing users to ...
1
vote
3answers
187 views

Extracting an encoded linestring from a website

I need to extract this highway route on this webpage. https://scenicbyways.info/byway/80452.html web scraping is not part of my skill repertoire. Sometimes I add .geojson to the end of map link and ...
2
votes
1answer
747 views

How to get overlapping polylines displayed correctly in Leaflet?

The situation: I work on a web application where routes (represented by polylines) are displayed, that are partly overlapping, meaning some segments belong to more routes. The data: The polylines ...
1
vote
1answer
624 views

QGIS to web map plugin

Is there a QGIS plugin that will allow me to embed an interactive web map on a website that requires limited coding? If so, what plugin(s) would be useful for this? I do not need to use open source ...
1
vote
0answers
102 views

satellite imagery basemap for webmapping application

I am currently trying to develop a small webmapping application to show some point data which covers the whole planet. I do want to use projections different from webmercator, like Robinson ...
0
votes
1answer
614 views

GeoJSON layer not displaying in OpenLayers 3

I am quite new to OpenLayers so it could be something simple. I have a map with the OS tile service and a number of boundaries layers in GeoJSON and they are in EPSG:27700. I have tried for quite ...
1
vote
1answer
677 views

Adding an ArcGIS webmap into QGIS?

I have a topographical map of the Netherlands from Esri. I was hoping if somebody could tell me how I could add this map to my QGIS. The map can be found on: https://www.arcgis.com/home/item.html?id=...
1
vote
1answer
533 views

What is leaflet-src.map?

I've download the Leaflet package and there is "leaflet-src.map" what is it exactly ? Do i need it to use correctly leaflet ?
-1
votes
1answer
272 views

WebMap framework - map+information [closed]

I am looking for a kind of Content Management System (CMS) for WebMaps, which already provide components such as a map area, sidebar (description and information), menu, etc. A list of possible ...
1
vote
0answers
47 views

CSS and border transparency around web map markers

The issue is that the image that I have in a web map visualizes map markers and place icons with white space around them. I checked this in the FireFox browser developer console and it seems to be an ...
1
vote
0answers
35 views

Interactive map for linguistic purposes [closed]

I would like to learn how to do dynamic/interactive maps for users interested in linguistic issues. In short, the idea is that a user could choose for instance between two syntactic constructions (Put ...
1
vote
1answer
105 views

Show popupson hover doesn't work with WMS layer

I am using qgis2web on QGIS for making a simple webmap. I imported a WMS layer (road) and i exported the webmap with "show popups hover" checked.But popups it doesn't work. When i put the layer from ...
0
votes
0answers
541 views

Display Mouse Position OpenLayers in Custom Projection

Being extremely new to this I am trying to build a fully functioning map from scratch using OL3 have tried to work this out myself but I just can't get it to work I always seem to get the ESPG 3857 ...
1
vote
1answer
308 views

How do I add a MapProxy overlay to Google Maps API?

I have Mapserver running, reading from a raster file, which I can overlay over Google Maps using its Javascript API. Now, for caching of tiles, I need to use MapProxy URL for Google Maps overlay. How ...
3
votes
0answers
754 views

Accessing password protected WMS Layer

I have a WMS layer hosted on Geoserver that is being shown on a web map using the Google Maps API. The problem is that for now I want to use basic authentication on the Geoserver. Every time you try ...
1
vote
1answer
3k views

How to add marker in Leaflet base on Google Maps layer?

I have tried many way to add marker base on Google Maps but it doesn't work at all, but if I changed my base map to such as open street map which provide by Ersi or Leaflet, it does work. Why is it ...
1
vote
1answer
1k views

Changing GeoJSON feature draw order with Leaflet

I have county polygons in GeoJSON format. Obviously, some of the counties share an edge. When a county is hovered over, the stroke and fill change to a red color. The problem is that the stroke of ...