IDLnetOGCWMS

An IDLnetOGCWMS object lets you access a Web Map Service (WMS) server that supports the Open Geospatial Consortium (OGC) standards. The OGC is an international group working to develop standards for the exchange of geospatial content and services including specifications for web delivery of data that combines location and geospatial information.

For additional information on IDL's WMS features, see the following sections:

Web Map Service (WMS) Overview

Supported OGC WMS Version

Making OGC WMS Server Requests

Translating a URL into Property Values

Using Callbacks with the IDLnetOGCWMS Object

HTTP Authentication, Security and Encoding

Note
See Feature Support by Operating System (What's New in IDL 7.1) for information on which IDL platforms support the IDLnetOGCWMS object.

Note
A sample IDL program included in the IDL distribution provides a generic WMS browser that lets you peruse and request coverages from a remote OGC server. See Sample WMS Browser for details.

Superclasses

None

Creation

See IDLnetOGCWMS::Init.

Properties

Objects of this class have the following properties. See IDLnetOGCWMS Properties for details on individual properties.


AUTHENTICATION	CALLBACK_DATA
CALLBACK_FUNCTION	CAPABILITIES_FILENAME
CONNECT_TIMEOUT	CONTENT_TYPE
ENCODE	FEATURE_INFO_FILENAME
HEADERS	LAST_FILE
MAP_FILENAME	PASSWORD
PROXY_AUTHENTICATION	PROXY_HOSTNAME
PROXY_PASSWORD	PROXY_PORT
PROXY_USERNAME	RESPONSE_HEADER
SSL_CERTIFICATE_FILE	SSL_VERIFY_HOST
SSL_VERIFY_PEER	TIMEOUT
URL_HOSTNAME	URL_PATH
URL_PORT	URL_QUERY_PREFIX
URL_QUERY_SUFFIX	URL_SCHEME
USERNAME	VERBOSE
WMS_VERSION

Methods

This class has the following methods:

Examples

See the following methods for examples:

IDLnetOGCWMS::GetLayers

IDLnetOGCWMS::GetMap

Sample WMS Browser

The IDL distribution includes a sample program that allows you to enter a working URL to an OGC server and then call GetCapabilities, GetMap and GetFeatureInfo from within the user interface. You can modify property values and query characteristics to return the desired data. To run the browser program, enter OGC_WMS at the command line. See the browser help for more information.

Tip
You can use the example IDL OGC WMS Browser as a template for creating an application that queries a remote WMS server. This example is located in the IDL_DIR\examples\ogc\wms directory where IDL_DIR is the directory where you have installed IDL. Running the example lets you parse a known, working URL to an OGC WMS server, and then make GetCapabilities, GetMap and GetFeatureInfo requests. By default, returned files are written to your application user directory, a subdirectory of your home directory.

Version History


6.4	Introduced