Data Scrounging 101 Steve Signell, Instructor Robert Poirier, TA School of Science Rensselaer Polytechnic Institute Monday, February 10, 2014 GIS in the Sciences ERTH 4750 (38031)

GeoData: where can you find it? Governments Federal State County Municipal Academia NGOs Private industry Open Source Projects (e.g. OpenStreetMap) Internet

Formats GeoData repositories ESRI shapefiles kml/kmz geoJSON Rasters (e.g. ESRI GRID, geoTIFF, geoPDF) GeoData Servers Web Map Services (WMS) Tile Services Web Feature Services (WFS) netCDF: Multidimensional (spatio-temporal) raster data

ESRI Shapefiles Collection of 4-7 files

KML/KMZ Spatial Variant of XML Google Earth

GeoJSON Spatial Variant of JSON Internet

Rasters Not really human-friendly in raw format

Web Map Services (WMS) A Web Map Service (WMS) is a standard protocol for serving georeferenced map images over the Internet that are generated by a map server using data from a GIS databasegeoreferencedGIS t=GetCapabilities& GetCapabilities - returns parameters about the WMS (such as map image format and WMS version compatibility) and the available layers (map bounding box, coordinate reference systems, URI of the data and whether the layer is mostly opaque or not)URI WEB/QGIS demo

Web Feature Services (WFS) The Open Geospatial Consortium Web Feature Service Interface Standard (WFS) provides an interface allowing requests for geographical features across the web using platform-independent calls.Open Geospatial Consortiuminterfacegeographicalweb Like WMS, but have access to attribute tables, can run analysis

Tile Services A Tile Map Service or TMS, is a specification for storing and retrieving cartographic data, developed by the Open Source Geospatial Foundation.Open Source Geospatial Foundation most widely supported by web mapping clients and servers; although there is some desktop support pServer/tile/{z}/{y}/{x}.png WEB/QGIS demo

Break

Open Geospatial Consortium (OGC) Website: The Open Geospatial Consortium (OGC) is an international industry consortium of 475 companies, government agencies and universities participating in a consensus process to develop publicly available interface standards. OGC® StandardsOGC® Standards support interoperable solutions that "geo- enable" the Web, wireless and location-based services and mainstream IT. The standards empower technology developers to make complex spatial information and services accessible and useful with all kinds of applications.

Geospatial Data Abstraction Library (GDAL/OGR) Website: GDAL is a translator library for raster geospatial data formats that is released under an X/MIT style Open Source license by the Open Source Geospatial Foundation X/MITOpen SourceOpen Source Geospatial Foundation OGR is like GDAL, but for rasters QGIS demo

The National Map Website: Data Viewer: Allows spatial queries (QGIS Demo) Web Map Services: html html

Open Street Map Website: OpenStreetMap is built by a community of mappers that contribute and maintain data about roads, trails, cafés, railway stations, and much more, all over the world. QGIS demo

NYS GIS Clearinghouse Website: Orthoimagery: WMS also

Rensellaer County Search NY GIS Clearinghouse: County Website:

ArcGIS online Website: Demo:

Questions? 19 5 min break