MapTiler: Map Publishing a la Google Maps

MAPTILER: MAP PUBLISHING A LA GOOGLE MAPS Mgr. Petr Přidal - Klokan klokan@klokan.cz FOSS4G 2009, Free and Open Source Software for Geospatial Sydney, Australia 20-23 October 2009 Thursday, October 22, 2009

Thursday, October 22, 2009

MAPTILER - WHAT IS IT? • 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) Thursday, October 22, 2009

STANDALONE MAP DEMO Thursday, October 22, 2009

GOOGLE MAPS OVERLAY DEMO Thursday, October 22, 2009

OPENLAYERS DEMO Thursday, October 22, 2009

GOOGLE EARTH DEMO Thursday, October 22, 2009

MAP TILER GENERATES TILES: Thursday, October 22, 2009

NECESSARY TRANSFORMATIONS AND WARPING GEODETIC COORDINATES SPHERICAL MERCATOR PYRAMID COORDINATES TILE INDEX LATITUDE LONGITUDE METERS XYZ PIXELS / ZOOM XYZ TILE / ZOOM WGS 84 (EPSG:4326) EPSG:3785 / EPSG:900913 WEB VIEWERS TILE MAP SERVICE Thursday, October 22, 2009

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! Thursday, October 22, 2009

OPEN-SOURCE ALTERNATIVES: PREGENERATING X CACHING TILES • Caching tiles from WMS servers • Generating from raster input: (MapServer, GeoServer): • GDAL2Tiles & MapTiler GUI • TileCache.org (Python) • MSR MapCruncher • GeoWebCache.org (Java Servlet) • Generating from features (vectors) • Mapnik • GMapCreator, • ... Thursday, October 22, 2009

EXTREMELY FAST ONLINE MAPS FOR 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 Thursday, October 22, 2009

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: s • Fast parallelized rendering and merging of large data collections nte cli • Google’s MapReduce approach (via Nokia labs Disco project) r fo Thursday, October 22, 2009

Who are users of MapTiler / GDAL2Tiles? NOAA (Nautical Oceanic and Atmospheric Administration), BRGM (Bureau des Recherches Geologiques et Minières) US Forest Service European Commission: Joint Research Center National Library of Scotland Mobile 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, 2008 David Rumsey (DavidRumsey.com) BRGM (Bureau des Recherches Geologiques et Minières) Moravian Library Brno, Czech Republic NIC.CZ: VIP competition Czech Technical University in Prague (prof. Veverka) PROJECT OLDMAPSONLINE.ORG Moravian Library Brno, Czech Republic Thursday, October 22, 2009

WWW . MAPTILER . ORG Runs under Windows, Linux and Mac OS X + GDAL2Tiles You can try it on the FOSS4G LiveDVD! Community: MapTiler User Group maptiler@googlegrups.com 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 Thursday, October 22, 2009

MapTiler: Map Publishing a la Google Maps

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