RFC 24: GDAL Progressive Data Support

Author: Norman Barker
Contact: nbarker@…
Status: Development

Summary

Provide an interface for data streaming support in GDAL. The RFC focuses on JPIP, but should be generic enough to apply to other streaming / progressive formats.

Definitions

JPIP: JPEG 2000 Interactive Protocol

Objective

To provide an interface to a streaming data source in a convenient manner for RasterIO operations within GDAL and to expose this interface via swig.

JPIPKAK - JPIP Streaming

JPEG 2000 Interactive Protocol (JPIP) flexibility with respect to random access, code stream reordering and incremental decoding is highly exploitable in a networked environment allowing access to remote large files using limited bandwidth connections or high contention networks.

JPIPKAK - JPIP Overview

A brief overview of the JPIP event sequence is presented in this section, more information can be found at ​JPEG 2000 Interactive Protocol (Part 9 – JPIP) and the specification can (and should) be purchased from ​ISO.

An earlier version of JPEG 2000 Part 9 is available here ​http://www.jpeg.org/public/fcd15444-9v2.pdf, noting the ISO copyright, diagrams are not replicated in this documentation.

The JPIP protocol has been abstracted in this format driver, requests are made at the 1:1 resolution level.