GIS Stack Exchange
GIS Stack Exchange

Questions tagged [wms]

A Web Map Service (WMS) is a standard protocol for serving georeferenced map images over the Internet

WMS is a widely supported format for maps and GIS data accessed via the Internet and loaded into client side GIS software.

It also specifies a number of different request types, two of which are required by any WMS server:

  • GetCapabilities - returns parameters about the WMS and the available layers
  • GetMap - with parameters provided, returns a map image

Optionally (within the strict standard), WMS may also support

  • GetFeatureInfo - with parameters provided, returns attributes from the data at a point location.

WMS may offer any number of vendor specific operations which will be declared within the GetCapabilities response, an example of a vendor specific operation is:

  • GetStyles (MapServer)

Commonly, WMS servers have some Styled Layer Descriptor (SLD) capability, such SLD enabled WMS may support the following operations:

  • DescribeLayer
  • GetLegendGraphic

OpenGIS® Web Map Server Implementation Specification

Styled Layer Descriptor profile of the Web Map Service Implementation Specification

2333 questions
11
votes
3 answers

Extract portion of WMS raster layer

Using QGIS on Windows XP based desktop. I am trying to use USDA orthophoto data from this WMS server: "http://raster.nationalmap.gov/arcgis/services/Orthoimagery/USGS_EDC_Ortho_NAIP/ImageServer/WMSServer" I can get the layer into QGIS with no…
earthstephen
  • 121
  • 1
  • 2
  • 5
3
votes
1 answer

Where can I set GetLegendGraphic width?

Given a wms-service, the GetCapabilities request returns a legendurl like the following: If I specify a width (like below) when using GetLegendGraphic, it is ignored, and the width in LegendUrl is…
Bildsoe
  • 155
  • 8
2
votes
1 answer

In WMS, is there a way to provide appropriate resolutions/zoom levels?

I am looking for a way to tell a wms client which zoom levels or resolutions that are appropriate for a layer. Something like ... ... 1.0 2.0 …
Jonas Andersson
  • 121
  • 2
2
votes
0 answers

How to label a WMS layer from an Online Server, over which I do not have control?

I have discovered that the Western Australia Dept of Mines and Petroleum offers WMSs. On adding these to ArcMap, however, I notice that they do not have labels. For example, this means one must use the identify tool to get the name of a petroleum…
ndthl
  • 604
  • 8
  • 20
2
votes
0 answers

Downloading contextual GIS layer using QGIS

I am using QGIS 3.16 and I want to use a raster layer for analysis. The layer is available only through WMS service. I want to use the raster image with SCP tool for further processing and analysis. I am able to save the layer but with a reduced…
Allaudin
  • 29
  • 1
2
votes
2 answers

WMS dpiMode setting

What is dpiMode in a WMS URI and what do the different settings mean? I use a WMS layer as a basemap in a QGIS project. Its URI includes dpiMode=7. There are some visual artifacts when my overall map is rendered at 96 dpi (for MBTiles generation),…
Houska
  • 7,976
  • 19
  • 48
2
votes
1 answer

Add imagery from SIX maps using WMS

I am new to QGIS WMS and trying to add imagery from Six Maps. https://maps.six.nsw.gov.au/arcgis/rest/services/public/NSW_Imagery/MapServer I have tried the steps in here also adding as an ArcGisFeatureServer -> New connection QGIS: Connect to a…
SHAW
  • 81
  • 1
  • 4
2
votes
1 answer

Returned BBOX of a WMS with varying aspect ratio

WMS GetMap queries take a BBOX parameter for the map and a WIDTH and HEIGHT parameter for the image. If the aspect ratio of the image (WIDTH/HEIGHT) doesn't match the aspect ratio of the BBOX (dx/dy) does the spec say it will distort the image into…
Spacedman
  • 63,755
  • 5
  • 81
  • 115
2
votes
0 answers

How to color a WMS layer using database value

I have a transparent WMS layer of polygons. It is a map of a city and i want to color the map according to crime rate. Rate values are obtained from database. I dont know how to select a single polygon from that layer and color it according to the…
Ann
  • 21
  • 2
1
vote
1 answer

Determine 'native' size of wms layer based on GetCapabilities response

I'm trying to understand the relation between a and in a GetCapabilities WMS response, given that the SRS of the bounding box is EPSG:4326. Here's an example of the WMS that I'm trying to query: