Finding Geospatial Data A closer look at several useful sources of free geospatial data René Duplain Data Analyst,

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Presentation transcript:

Finding Geospatial Data A closer look at several useful sources of free geospatial data René Duplain Data Analyst, Pierre Leblanc Cartographic and GIS Support Specialist,

Introductions

Workshop outline ●Intro to geospatial data ●Explore various data portals o Scholars GeoPortal  Hands-on Tutorial o Geogratis  Video o Open Data Ottawa o GSG Libguide o Other sources ●Mapping geospatial data with sample datasets ●Complete evaluation form

Intro to geospatial data Common questions: ●What is geospatial data? ●What are the most useful sources of free geospatial data available? ●How do I navigate these portals? ●What is metadata and why is it important? ●Where do I start my data search for my next project?

Geospatial data can take many forms... Excel table Shapefile DBF JPG BMP Google Earth KML AutoCAD File Geodatabase MicroStation Design DEM ERDAS IMAGINE Adobe Geospatial PDF GEORSS Esri Grid TIFF GIF SRTM XML … and more! Geospatial Data

Our definition ●“Geospatial data identifies and describes the geographic location of features and boundaries. Spatial data is usually stored as coordinates and topology and can be mapped. There are two types of geospatial data: vector and raster.” -

Vector data

Raster data

“Layering” data

Scholars GeoPortal

Scholars GeoPortal - Tutorial

Geogratis

Open Data Ottawa

GSG Website

Other useful sites ●geoOttawa o ●Open Data o ●USGS Earth Explorer o ●Natural Earth Data o ●OpenStreetMap o ●SEDAC o

Mapping geospatial data ●Download data: _data/

Questions? Please complete evaluation form

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