ogc-specifications

The package ogc-specifications is a implementation of the OGC Web Service Specifications as defined by the OGC. This package has support for the following OGC Web Service Specifications Operations:

Spec	Version	Operation	Request	Response
WMS	1.3.0	GetCapabilities	✔️	❕
WMS	1.3.0	GetMap	✔️
WMS	1.3.0	GetFeatureInfo	✔️
WFS	2.0.0	GetCapabilities	✔️	❕
WFS	2.0.0	DescribeFeatureType	✔️
WFS	2.0.0	GetFeature	✔️
WMTS	1.0.0	GetCapabilities	✔️	❕
WCS	2.0.1	GetCapabilities	✔️	❕

Purpose

It will provide the user with OperationRequest, Capabilities (and limited to GetCapabilities OperationResponse) structs for the different OGC specifications that can be used with in a developers application, so one doesn't needs to create/build those complex structs for 'every' application that has more then 'simple' interaction with a OGC Web Service. It will allow the developer to parse XML documents and query strings like they are defined in the OGC specification an build go structs with it and it will generate XML documents and KVP query strings based on those structs.

The different packages follow the same relations that are defined in the OGC specifications. For example the WFS 2.0.0 and the WMTS 1.0.0 share the underling WSC 1.1.0 package.

OGC package relations

Notice

⚠️ This is still a 'work-in-progress' with the following major to do's:

WFS StoredQuery support
WMTS GetTile support
WCS GetCoverage support
OGC response support for metadata calls like GetCapabilities and DescribeFeatureType
Sufficient validation support
Cleanup YAML parser
WMS Time & Elevation parameters

Installation

go get github.com/pdok/ogc-specifications

import a specific ogc specification like wms of wfs.

import wms "github.com/pdok/ogc-specifications/pkg/wms"
import wfs "github.com/pdok/ogc-specifications/pkg/wfs"

Test

go test ./... -covermode=atomic

And for benchmarks:

go test -bench=. ./...

And generate CPU & MEM profiles:

go test -cpuprofile cpu.prof -memprofile mem.prof -bench=.  ./...

For visualization use pprof

Usage

Concept

THe idea is that OGC Webservice requests, both GET and POST, can be deserialize to structs. Because the POST request contain a XML body they can be directly unmarshelled to the 'matching' struct. The GET request have a number of predefined Key Value Pairs (KVP) in their querystring that need to be consumed for building the struct.

From the created struct one can:

Validate the struct itself (grammatically)
Validate the struct against a Capabilities document (context)
Generate a new request object (formatting)

How to Contribute

Make a pull request...

License

Distributed under MIT License, please see license file within the code for more details.

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