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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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160 views

Web mapping API popularity

Are there any online statistics for the popularity/usage of web mapping APIs? A diagram would be sufficient, if it can be published in a paper. I have only found one source: https://trends.builtwith....
4
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0answers
164 views

How to visualize fuzzy/approximate locations

I need to visualize a mixture of accurate and fuzzy/approximate locations on a web map. The user should be able to instantly recognize approximate locations from the marker used. Are there any best ...
4
votes
1answer
707 views

How to offset/displace overlapping lines in a web map?

I have a dataset of points representing a To/From status - something like distribution centres and delivery addresses. When the user clicks on a point I'd like to show the relationships between this ...
3
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0answers
708 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 ...
3
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0answers
249 views

mapnik-vector-tile produces tiles with only one feature

I've written some C/C++ code to wrap mapnik-vector-tile and produce a mapbox vector tile from GeoJSON. mvtc_return * mvtc_from_geo_json(const int tile_size, const ...
3
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0answers
437 views

Using dynamic terrain in cesium?

I've been looking into tools for displaying dynamic terrain (x,y,z(t)) via the browser and I just recently came across cesium.js which looks like a wonderful tool at first glance. Many of the demos ...
3
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0answers
159 views

Is it possible to render tile-based web mapping projects in any other projection than web mercator?

Web-mapping technology has to a large degree adopted the web-mercator projection as the standard projection for displaying geographic objects with interactive map-clients. This is due to many factors ...
3
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0answers
1k views

Error in uploading data in QGIS cloud

I want to publish my .shp file using QGIS Cloud plugin. I signed in to qgiscloud.com (free). On create new database it will auto create dbname='fbeudp_mfaphk' user='fbeudp_mfaphk' password='68456287'...
2
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0answers
21 views

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 ...
2
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1answer
56 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 ...
2
votes
1answer
70 views

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 ...
2
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0answers
147 views

Reproject vector layer in QGIS?

I want to warp a vector layer (set of polygons, but not a raster map) to fit a map. The problem is, the vector layer coordinates are from 0 to 360 and the basemap layer coordinates are from -180 to ...
2
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1answer
1k views

Google Maps API extract elevation value along route

I am using the Directions and Elevation Service of Google Maps, in order to extract the coordinates and the elevation along a route between a start and end point. I could set my directions service ...
2
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0answers
498 views

Geoserver REST API - Change styles on the fly

I'm uploading user-defined rasters to geoserver through its REST API, using the Python requests library. I would like to classify and style the rasters based on users' choices, so the styles should ...
2
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0answers
374 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 ...
2
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0answers
277 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 ...
2
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0answers
138 views

Using RasterLite in a Cordova App

I would like to use RasterLite data in a Cordova-based App but don't know the right tools to achieve this. The [Geopaparazzi Project] uses SpatiaLite files generated with the rasterlite2 library to ...
2
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0answers
113 views

In QGIS Web Client - How to click on a photo in an attribute table and load into a new browser tab?

I have a map loaded into my QGIS web client, and have images loaded into my attribute table for a specific layer. Works great - when I click info on one of the layer attributes, it shows the image. ...
2
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0answers
184 views

point in multiple polygons

I have a point (lat/lng) and a collection of geofences (polygons / circles / rectangles) Simply put, I want to know if the point is inside ANY of the geofences, it's not important which one. I know ...
2
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0answers
254 views

Consuming GeoServer UTFGrid output in OpenLayers 3 ol.source.TileUTFGrid results in error processing response object

GeoServer now supports UTFGrid outputs for layer services. This is great however the support for consuming them seems incomplete in OpenLayers 3. I set up a simple map to attempt this but can't get ...
2
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0answers
288 views

DLLs or examples to support writing a shp, shx, dbf file as memory stream for uses on Azure website?

I'm trying to read/write shapefiles for a web service for an azure website and I do not have the luxury of accessing the local file storage (which means that reading/writing from/to disk is out of the ...
2
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0answers
139 views

GeoDjango WebMapping Application Update

According to the below GIS.SE questions, GeoDjango was the preferred framework for creating simple and quick webmap applications. But these questions are now all 2-3 years old. Can we verify whether ...
2
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0answers
64 views

Displaying buses from a transport network (newbie)

First of all, I'm noob in this subject so please give me some advice. I'd like to develop something like http://traintimes.org.uk/map/london-buses/#73 but with my own city. Unfortunately our MTA ...
2
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0answers
81 views

Layer Turned Off But Pop Up Showing

I'm having an issue with my popup in my map made using ArcGIS online. One of my group layers contain 4 layers. When I turn all of the layers in this group layer off, the second layer's popup still ...
2
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0answers
196 views

How to optimize color ramp for terrain

I'm working on a project to highlight LiDAR terrain on the web and part of the idea is to show the detail of the data at large scales. I've already read through the excellent Mapbox guide and I've got ...
2
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0answers
79 views

Libraries and/or ideas for navigating WMS time-parameter

I'm currently working on a project where we need to incorporate the TIME-dimension of WMS-layers (see http://docs.geoserver.org/latest/en/user/services/wms/time.html#wms-time) in our web map. The ...
2
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0answers
129 views

Activity Dashboard for LocalHost

ESRI recently put out a new tool called the 'Activity Dashboard' that checks for new maps created, map uses, etc. Sadly, this tool only works for those maps created through the ArcGIS online system. ...
2
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0answers
1k views

MapFish PDF: Geoserver WMS layers not generated as tree structure

I am using the mapfish printing module in my web map application.In that everything is working fine but layers not generated as tree structure in output PDF file and "ODC_Graphics_Data" wms layer not ...
2
votes
0answers
441 views

Comparison of SDI frameworks

What are the main differences between these SDI, especially in the level of geospatial features and ease of integration with existing CMS? Cartaro Geonode GeOrchestra EasySDI I wonder for the ...
2
votes
0answers
22 views

arcmap envelope coordinates from webbrowser tool

So I have my own php file with textfields which I run in my add in. Now I want to get the variables from the textfields and automatically give the value of the textfields to my env.PutCoords(x,y,x,y) ...
2
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0answers
174 views

Optimize ArcServer Service Drawing Speed

I am managing an ArcGIS service that is used by Geocortex Essentials as a web map app for some users. The feedback I have got so far is that it doesn't refresh fast enough. I'm looking for some ...
2
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0answers
210 views

spatial queries by webgis and virtualizing

i have a question regarding this tutorial: http://www.gistutor.com/postgresqlpostgis/10-intermediate-postgresqlpostgis-tutorials/75-understanding-postgis-spatial-queries.html As u see, it ...
2
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0answers
1k views

Projecting point in Leaflet from EPSG 900913 (same as 3857) to EPSG 2232 with proj4js returning unexpected results

I have a leaflet map from which I want to be able to query an API that accepts x y values in EPSG 2232 as inputs. Leaflet doesn't handle point transformations like OpenLayers does so I am trying to ...
2
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0answers
2k views

Problem with multipolygon in Leaflet

I'm using Leaflet L.Polygon, but for some reason there's only blank site. Here's my code: var map = L.map('map').setView([37.8, -96], 4); var cloudmade = L.tileLayer('http://{s}.tile....
2
votes
0answers
295 views

KML files to IPad securely? Altitude and shape problems in Google Earth

Does anyone know any options for maintaining privacy of the files and getting them onto iPad using Google Earth? Using Google account to link to Google Earth, privacy settings in Google my maps are ...
2
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0answers
47 views

new administrator - Advice to choise a best web sharing GIS DATA with authorization information level

i'm a new "GIS 's needer" and i have just Pleasantly surprised to find your community ( thanks google!!!! ) I need for my office's project a appication who permit web sharing(only reading)some gps ...
2
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0answers
303 views

Developing maps using Tile Mill and Processing(.org)?

I had a small question. I actually would like to build an application which is very similar to this but as a map and not on “Multi touch Table Top”. The functionality I need is Plot different ...
2
votes
2answers
118 views

Which web maps work best for which web services

I'm trying to do a project, where I grab data from a MySQL database, and display it onto a web map API mashup (showing a chart on the map). I want to develop an example using REST, SOAP and possibly ...
1
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0answers
30 views

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 ...
1
vote
0answers
44 views

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 ...
1
vote
0answers
48 views

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 ...
1
vote
0answers
15 views

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. ...
1
vote
1answer
34 views

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 ...
1
vote
1answer
148 views

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 ...
1
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0answers
309 views

Show tooltip on the D3 map

I've created a basic map using D3 with countries GeoJSON. Here is the demo. Now when the user clicks on any coordinate on the map, I am showing a weather info within a tooltip with weather icon as a ...
1
vote
0answers
37 views

Looking for tile-grid polygon layer

I'm looking for a vector-grid that has grid-cell boundaries for every tile/zoom-level in the standard x/y/z web-map tiling scheme. Googling has done me no good...anyone know of a source?
1
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0answers
105 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
0answers
84 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
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
0answers
101 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 ...