Image Mosaics

OGC WMS via GeoServer

Presentation by Jonathan Meyer Applied Information Sciences May 2, 2015

Agenda

• Motivation
• Standards
• Dataset
• Software
• Automation
• Demo
• Review
• Links

Motivation

Provide single point of access to thousands of images individually or as composite mosaic.

Standards

Open Geospatial Consortium (OGC) is the governing body for a host of geospatial data standards.

The OGC Web Map Service (WMS) specification provides an HTTP interface to visualize geospatial data.

Dataset

Suomi National Polar-orbiting Partnership (NPP) satelite VIIRS sensor, a scanning radiometer, collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans.

Day / Night Band used due to the publicly available datasets continuously distributed with current coverage.

Software

Leveraging a fully FOSS stack:

• PostgreSQL / PostGIS
• GeoServer
• OGC Preview

Automation

Your time is valuable. Don't repeat yourself. Use:

• GeoServer REST API
• Docker
• Scripting (Python/BASH/Perl *gasp*)

Demo

• Docker Compose Start
• Image Mosaic Configuration (PostGIS/GeoServer)
• WMS Query Examples (temporal/attribute)
• REST API Seeding and Manipulation
• OGC Preview Visualization

Review

• GeoServer to provide OGC WMS exposure of images
• Footprint index stored in PostGIS
• GDAL for mosaic performance pre-processing optimization
• Marlin for extreme rendering performance boost
• Isolation and reproducibility via Docker and GeoServer REST API

Links

• GeoServer Image Mosaic Tutorial
• Image Mosaic Indexer Reference
• GeoServer REST API Reference
• Marlin High-Performance Java2D Renderer
• Docker Compose Reference
• VIIRS Beginners Guide
• Demo HTTP requests - Postman Import

Questions?

Source code and presentation http://github.com/gisjedi/foss4g-na-2016