MapTiler: Map Publishing a la Google Maps

FOSS4G 2009, Free and Open Source Software for GeospatialSydney, Australia 20-23 October 2009

Mgr. Petr Přidal - [email protected]

MAPTILER:MAP PUBLISHING A LA GOOGLE MAPS

Thursday, October 22, 2009



• MapTiler is an easy to use graphical application for online map publishing, interface for GDAL2Tiles and GDAL functionality

• It supports popular raster formats (GeoTIFF, JPEG2000, MrSID, ECW, Erdas HFA, BSB, ...) exported from GIS systems (Grass, ... ESRI ArcGIS, MapInfo, ...)

• It uses existing georeference (World Files, WKT, EPSG,...) and is able to transform (warp) map projections

• Generates a web viewer (OpenLayers, Google Maps API) and KML files (Google Earth, indexing) for the raster data

• Standards: OSGEO Tile Map Service Specification - TMS (work in progress on the OGC WMTS)

MAPTILER - WHAT IS IT?


STANDALONE MAP DEMO


GOOGLE MAPS OVERLAY DEMO


OPENLAYERS DEMO


GOOGLE EARTH DEMO

































MAP TILER GENERATES TILES:


NECESSARY TRANSFORMATIONS AND WARPING

GEODETIC COORDINATESLATITUDE LONGITUDEWGS 84 (EPSG:4326)

SPHERICAL MERCATORMETERS

EPSG:3785 / EPSG:900913

PYRAMID COORDINATESXYZ PIXELS / ZOOM

WEB VIEWERS

TILE INDEXXYZ TILE / ZOOM

TILE MAP SERVICE





EPSG:3785 / EPSG:900913


WEB VIEWERS


TILE MAP SERVICE





EPSG:3785 / EPSG:900913


WEB VIEWERS


TILE MAP SERVICE





EPSG:3785 / EPSG:900913


WEB VIEWERS


TILE MAP SERVICE


SPHERICAL MERCATOR:TILE PROJECTION AND COORDINATES

NOT ONLY IN GOOGLE MAPS!

• Popular on the web: Google Maps, Microsoft Bing Maps, Yahoo Maps, OpenStreetMap, ...

• Lat/Long WGS84 (GPS devices) datum coordinates always displayed to users - KML

• Map rasters are projected by a global Mercator projection: “Spherical Mercator”. EPSG:900913 / EPSG:3857 (meters)

• Conformal, cylindrical. Cropped to square (maximal latitude ~ 85.05 degrees), WGS84 ellipsoid is sphere!


OPEN-SOURCE ALTERNATIVES: PREGENERATING X CACHING TILES

• Generating from raster input:

• GDAL2Tiles & MapTiler GUI

• MSR MapCruncher

• Generating from features (vectors)

• Mapnik

• GMapCreator,

• ...

• Caching tiles from WMS servers (MapServer, GeoServer):

• TileCache.org (Python)

• GeoWebCache.org (Java Servlet)


EXTREMELY FAST ONLINE MAPSFOR THOUSANDS OF PEOPLE

• Easy hosting: only static files / or raster blobs in a database

• Extremely fast delivery, highest-quality output possible (you have more time for rendering), SLA for up to 99.99% availability










PARALLELIZED RENDERING,CLUSTERS: PP & MAPREDUCE

• Parallelized rendering on Multi-Core processors or even on computer clusters (Amazon EC2 supported)

• Speed-up the rendering on modern computers via Parallel Python

• Rendering on a computer cluster (Amazon EC2) - price: 0.1 USD / hour / core

• Publishing of tiles on a world-wide CDNs (Amazon S3/CloudFront, Google App Engine, Azure, SimpleCDN) - fast multi-threaded upload for tiles

• Merging of huge raster datasets into a seamless map a la Google Maps on a computer cluster:

• Fast parallelized rendering and merging of large data collections

• Google’s MapReduce approach (via Nokia labs Disco project)for

clien

ts


Who are users of MapTiler / GDAL2Tiles?

NOAA (Nautical Oceanic and Atmospheric Administration),BRGM (Bureau des Recherches Geologiques et Minières)

US Forest ServiceEuropean Commission: Joint Research Center

National Library of ScotlandMobile operators: Three, Orange, ...

Companies from: USA, UK, France, Netherlands, Australia, New Zealand, Italy, Spain, Chile, ...

MapTiler development was supported by:

Google Inc. : Summer of Code 2007, 2008David Rumsey (DavidRumsey.com)

BRGM (Bureau des Recherches Geologiques et Minières)Moravian Library Brno, Czech Republic

NIC.CZ: VIP competitionCzech Technical University in Prague (prof. Veverka)

PROJECT OLDMAPSONLINE.ORGMoravian Library Brno, Czech Republic










Runs under Windows, Linux and Mac OS X + GDAL2Tiles

You can try it on the FOSS4G LiveDVD!

Community: MapTiler User Group

[email protected]

Commercial support, integration, customization

http://www.maptiler.com/

Release of the version 1.0 planned for the end of this year, software is now in beta version

WWW . MAPTILER . ORG


mailto:[email protected]

mailto:[email protected]

http://www.maptiler.com

http://www.maptiler.com

http://www.maptiler.org

http://www.maptiler.org

MapTiler: Map Publishing a la Google Maps

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MapTiler: Map Publishing a la Google Maps