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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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83 votes
31 answers
63k views

How to Start Web Mapping?

I want to start working on a web map at work to map some of our statistics by city. I have an idea, but I'm not exactly sure where to start. Are there any definitive resources that provide step ...
250 votes
4 answers
281k views

EPSG 3857 or 4326 for Web Mapping

The discussion at What is the difference between WGS84 and EPSG4326? shows that 4326 is just the EPSG identifier of WGS84.. Wikipedia entries for Google Maps and OpenStreetMap shows that they both ...
tmaj's user avatar
  • 2,613
138 votes
16 answers
89k views

Comparing various JavaScript mapping libraries?

I am working on a web-based mapping system and I'm trying to figure out which library to use. These are links to comparisons of available libraries: Laurent Jegou's benchmark (from 2010) is a global ...
47 votes
7 answers
50k views

Alternatives to ArcGIS Online?

I am considering purchasing ArcGIS Online for a group of users who currently use about 5% of ArcGIS capabilities (ArcMap, simple map creation and information display) about 80% of the time. Primary ...
32 votes
6 answers
18k views

Maximum number of point features in an OpenLayers vector layer

In your experience, how many point features can be added to an OpenLayers vector layer (new OpenLayers.Layer.Vector("Point Layer")) before it goes unusably slow? My use case is to display points from ...
underdark's user avatar
  • 84.3k
24 votes
9 answers
30k views

Viewing LiDAR data from web browser?

I am looking to host lidar data on my own server and give clients the ability to view that data through a web browser as a 3D point cloud (file would be in .las format or equivalent), possibly with ...
17 votes
5 answers
9k views

Looking for a FREE Cloud based 'Web Mapping Stack' Host [closed]

Any pointers to free cloud-based geoweb hosts? Use case: To display a basic interactive web map in Leaflet/ OpenLayers with data hosted in PostGIS served by GeoServer. I am looking at something very ...
Erick's user avatar
  • 873
59 votes
3 answers
27k views

Openlayers Animation Examples and Algorithms

i wonder for a long time if people in this community uses openlayers for animation needs. we have know this that animating on browser is a little bit exhausting for it but when a map meets with ...
30 votes
7 answers
19k views

What are my options for 3D web Maps?

I wish to have a Online 3D Map, which would show my Data, i.e both Raster and Vector, draped on a DEM that I have. Due to the requirements of using my own DEM & Raster data, Google Earth API is ...
Devdatta Tengshe's user avatar
22 votes
7 answers
11k views

Options for displaying PostGIS vectors in OpenLayers

I am very new to web-mapping, so this question may be a little misguided. I want to have a very simple web interface using OpenLayers (or even Google Maps if that will be easier) which can display a ...
fmark's user avatar
  • 9,381
9 votes
6 answers
7k views

List of Map Service Software [closed]

I am curious as to what GIS server software is out there. I have used a few different ones and am building a list of them. If you know of any others please mention it below because I would like to ...
0 votes
1 answer
2k views

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 ...
ziggy's user avatar
  • 4,536
33 votes
4 answers
7k views

Switching career from GIS Technician/Analyst to GIS Web Map Developer/Programmer?

I am a GIS Analyst at work that dabbles in python scripting in ArcGIS and the Google Maps JavaScript API V3. My professional goal is to either be in web mapping development or desktop/server GIS ...
22 votes
5 answers
2k views

Seeking developer-friendly web GIS? [duplicate]

I'm a recent Computer Science graduate who prides himself on his knowledge of software development and problem solving, but has no idea how GIS systems work. (Read: I'm a programmer.) I've been ...
Sophie McCarrell's user avatar
20 votes
4 answers
5k views

How do GIS web apps work? [duplicate]

I am completely new to GIS and therefore have questions regarding how the GIS Web development should be made, because the entire concept still confuses me. So, imagine I have a map. And by this, i ...
seth's user avatar
  • 311
17 votes
3 answers
15k views

How to georeference a web mercator tile correctly using gdal?

As an example I will take the following tile http://a.tile.openstreetmap.org/3/4/2.png and save it as "4_2.png". The WGS84 coordinates of this tile can be calculated or read there by ...
Name's user avatar
  • 890
13 votes
7 answers
12k views

Displaying 3D model of building in web-browser

I would like to try to show a proposed building in a web-browser such that the user can interact with it in a way similar to google maps streetview. Is it possible to do this, in any platform? I can ...
djq's user avatar
  • 16.3k
13 votes
10 answers
9k views

Web GIS Development Skill Sets [closed]

What technologies and skill sets should one who wants to do web GIS development study/acquire? One skill/technology per answer please.
R.K.'s user avatar
  • 17.4k
8 votes
6 answers
3k views

Maps zoomed around specific locations (magnifying glass effect)

How do I create a static map where the scale varies based on location? Example: to drive from a specific location X in Albuquerque to a specific location Y in Chicago, I want to "zoom" around X and ...
user avatar
6 votes
5 answers
6k views

Effectively displaying a large amount of data on Google Maps APi

I have about 20 layers that I'd like to put on a Google maps API. I assume I'll need some form of a tile cache server and perhaps under mapserver or geoserver. These layers amount to about 400mb so ...
dassouki's user avatar
  • 8,563
56 votes
4 answers
16k views

Why has Web Mercator (auxiliary sphere) become the web map standard?

I understand what the difference is between the Web Mercator projection and Web Mercator Auxiliary Sphere (WMAS). I also understand that both Google and Esri have adopted this projection as their ...
dkroy's user avatar
  • 1,368
34 votes
2 answers
24k views

What are the Differences Between TMS, XYZ & WMTS?

There are currently three different ways of Serving out Tiles: TMS WMTS XYZ I do know that XYZ is now the most popular one, and is used by services like Google, Mapbox, OSM and many others. What is ...
Devdatta Tengshe's user avatar
17 votes
2 answers
3k views

Understanding web mapping tools [duplicate]

I've been trying to understand GIS tools and applications to achieve the following: Build my own basemap Publish the basemap online Add my own data layers to the online basemap Perform analysis (on-...
KaushikTD's user avatar
  • 649
15 votes
2 answers
8k views

OpenLayers alternatives supporting more client-side features [closed]

I am considering different architectures for a system that will ideally use client-side rendering for point features and must be plugin-free. I have been using this application developed in response ...
tomfumb's user avatar
  • 3,688
14 votes
4 answers
745 views

Is there a FOSS solution for legend parsing in a web mapping environment?

Our web mapping requirements are fairly standard - some basic querying and the ability to print out the resulting map (or save the image). Typically we've used ESRI products in the past (right now we'...
ollyoop's user avatar
  • 195
13 votes
4 answers
1k views

How to create spatial tag clouds or "tag maps"?

I'm looking for implementations of spatial tag clouds or "tag maps". Some papers I found talk about a Yahoo Tag Maps API, but I couldn't find any such thing. I'd prefer OpenLayers-based solutions, ...
underdark's user avatar
  • 84.3k
13 votes
10 answers
2k views

GIS and natural disasters - examples of geo-visualizations and geospatial analysis

I stumbled upon NY Times' web map of deaths from tornadoes in US. Can you point me to some more interesting examples of geo-visualization and/or geospatial analysis of natural disasters and their ...
11 votes
2 answers
1k views

Web-mapping with editing capabilities? [closed]

I'm embarking on a new web map project that seeks to display simple geometries (lines, points, polygons) and rasters/basemaps. Ideally, the map will also allow authorized users to add/remove/edit ...
Radar's user avatar
  • 10.7k
11 votes
0 answers
2k views

Choosing map serving software [duplicate]

I'm new to GIS and need to learn for an internship. I've been reading a lot and now need help picking technologies to use... particularly the map serving technologies. Project requirements - Free ...
Nate's user avatar
  • 811
10 votes
3 answers
5k views

Restrict pan and zoom in ArcGIS Javascript API? [duplicate]

I'm creating a web map of a university campus. I have the map functioning, but I don't want to be able to pan off of the basemap, into whitespace. Do you know of a function that will auto-pan the ...
Tanner's user avatar
  • 7,383
8 votes
3 answers
2k views

Create interactive map with no server

I have managed to build a great web mapping application using tiles created from GeoWebCache and a custom gridset, but I now need to add an overlay to the base maps. The only interactivity I need is a ...
tjmgis's user avatar
  • 3,330
7 votes
5 answers
13k views

Seeking free web GIS browser?

I have created several projects for several different clients. Each project has OS maps, shapefile layers from Government Bodies, Shapefile layers created, AutoCAD dxf loaded in (in various manners). ...
6 votes
3 answers
5k views

Developing Web Application For Map [duplicate]

I have huge data of maps usually most of the table are co-ordinates and the other are raster maps stored in SQL server 2008 and PostGres Server. I am using desktop application to analyse the data. ...
kinkajou's user avatar
  • 4,426
6 votes
2 answers
2k views

What does Scale mean in the reference of Desktop GIS or WebGIS?

I'm having trouble understanding the meaning of the concept of scale when it comes to maps on screen, i.e. either in a Desktop GIS or in a WebMap. When it comes to paper maps, the idea is very clear. ...
Devdatta Tengshe's user avatar
4 votes
2 answers
11k views

OpenLayers2 - zoom to selected feature

If I have this vector layer: var vectors = new OpenLayers.Layer.Vector("vector", {isBaseLayer: false}); var feature = new OpenLayers.Feature.Vector( OpenLayers.Geometry.fromWKT( ...
Alfredo's user avatar
  • 91
4 votes
1 answer
4k views

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....
bm13563's user avatar
  • 253
4 votes
2 answers
723 views

Adding large amount of data to web map using ArcGIS API for JavaScript?

I've got problem, I'm creating map based application, and now I have to add to map about 100 000 graphic points, from coordinates. I was trying in many ways to do it, but always process of adding ...
Krystian's user avatar
  • 871
4 votes
2 answers
4k views

Hiding infoWindow of ArcGIS API for JavaScript while using measure tool?

In my Javascript API Web application I'm using the infoWindow to query a parcel layer and display display information in a popup when I click the parcel. I've set this functionality to turn on and off ...
AlexGilvarry's user avatar
4 votes
2 answers
2k views

What are the key features of a web map?

In response to comments, I'll rephrase the question: We're building a web based mapping and data querying system. The data are at several different scales, and should be queryable at these scales. ...
om_henners's user avatar
  • 15.7k
3 votes
2 answers
8k views

Leaflet MarkerCluster custom info window instead of spiderfy effect

So I have been experimenting with the Leaflet Marker Cluster and was wondering if there is a way to disable the spiderfy animation and change the event when cluster is clicked on? Instead the clicking ...
Diffusion_net's user avatar
3 votes
2 answers
5k views

Seeking interactive maps and associated technologies

The display of maps and data within an interactive framework is becoming more prevalent online. I'm thinking beyond merely the ability to pan/zoom/control layers, but more along the lines of ...
3 votes
3 answers
5k views

Render vectors from OSM data in POSTGIS database

I'm a newbie when it comes to mapping application. I had successfully loaded my OpenstreetMap data in a Postgresql/PostGIS database. Now my problem is how to render the vector data (the POI's, ways, ...
John Bautista's user avatar
3 votes
3 answers
197 views

Seeking tool(set) for creating community map? [closed]

When you move to a new place, it's very useful to have maps tailored to your interests available at the click of a mouse or tap of a smart phone. The following projects are great examples of more ...
RobinLovelace's user avatar
3 votes
1 answer
2k views

Problems with gxp Print plugin via opengeosuite sdk

I am trying to import the print plugin within an application built using the Opengeo Suite sdk and I have run into issues as is described in the following thread https://getsatisfaction.com/opengeo/...
k9ty's user avatar
  • 201
3 votes
2 answers
5k views

Access-Control-Allow-Origin error in web map

I am having trouble getting a WFS layer working using Geoserver, OpenLayers and GeoExt. I get the following error: XMLHttpRequest cannot load http://10.0.0.155/geoserver/wfs. Origin http://10.0.0....
James S's user avatar
  • 4,284
1 vote
1 answer
831 views

XYZ tiles generated with QGIS not visible when uploading on web server

I created a QGIS project and used Generate XYZ Tiles (Directory) to export the rendered image as raster tiles. Uploading the folder with its subfolder and raster tiles an FTP-Client to a web server, I ...
Babel's user avatar
  • 73.1k
1 vote
0 answers
927 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 ...
amin's user avatar
  • 67
42 votes
5 answers
37k views

Visualizing large datasets with other than Leaflet

When using Leaflet to visualize a large dataset (GeoJSON with 10,000 point features), not surprisingly the browser crashes or hangs. A sub-sample of 1000 features from the same dataset works ...
Imad's user avatar
  • 529
36 votes
12 answers
9k views

What is the state of the art in html5 geospatial applications?

I am very interested in the HTML5 canvas element for maps; work like Cartagen from an MIT Media Lab researcher looks very promising, for example. There is some interesting SVG based work at carto.net....
21 votes
4 answers
16k views

Creating simple front-end for PostGIS database

My organisation collects a lot of environmental monitoring data (stream flow, water chemistry etc.) most of which is currently stored in Excel. I’d like to get everything into a database – probably ...
JamesS's user avatar
  • 1,486