OGC Web Map Service (WMS)

Web Map Service (WMS)

1) Overview

The OpenGIS® Web Map Service Interface Standard (WMS) provides a simple HTTP interface for requesting geo-registered map images from one or more distributed geospatial databases. A WMS request defines the geographic layer(s) and area of interest to be processed. The response to the request is one or more geo-registered map images (returned as JPEG, PNG, etc) that can be displayed in a browser application. The interface also supports the ability to specify whether the returned images should be transparent so that layers from multiple servers can be combined or not.

NOTE: WMS 1.3 and ISO 19128 are the same documents.

2) Download

Document
1.3.0	OpenGIS Web Map Service (WMS) Implementation Specification
1.1.1	Web Map Service

Schemas

capabilities_1_3_0.xml

capabilities_1_3_0.xsd

exceptions_1_3_0.xml

exceptions_1_3_0.xsd

3) Operations

The three operations defined for a WMS are GetCapabilities, GetMap, and GetFeatureInfo. GetFeatureInfo is optional. This clause specifies the implementation and use of these WMS operations in the Hypertext Transfer Protocol (HTTP) Distributed Computing Platform (DCP).

3.1) GetCapabilities (mandatory) - 서비스 메타데이터를 조회.

3.2) GetMap (mandatory) - 요청받은 파라메터를 통해 이미지 반환.

3.3) GetFeatureInfo (optional) - 요청한 파라메터에 따라 해당하는 위치의 피쳐정보를 반환.

4) Reference

• http://www.opengeospatial.org/standards/wms

• http://schemas.opengis.net/wms

• http://mapserver.org/ogc/wms_server.html

• http://docs.geoserver.org/stable/en/user/services/wms/reference.html