1 overview finding and importing data sets –searching for data –importing data_

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1 Overview • Finding and importing data sets – Searching for data – Importing data_

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  • OverviewFinding and importing data setsSearching for dataImporting data_

  • OverviewSearching for dataWeb search enginesNSDI Geospatial Data ClearinghouseUSGS GeoData siteThe Geography NetworkUniversity of Washington Map Library Geospatial Data Archive (WAGDA)GIS Data Depot

  • OverviewSearching for dataWeb search enginesNSDI Geospatial Data ClearinghouseUSGS GeoData siteThe Geography NetworkUniversity of Washington Map Library Geospatial Data Archive (WAGDA)GIS Data Depot

  • Searching for data: Web search enginesPrimary method for searching for general data on the net(+) Keyword searching(+) Logical parsing of searches(+) Search is far and wide(+) Possible to use meta-searchers(+) Graphical results() Low precision_

  • Searching for data: Web search enginesSearch for GIS & dataresults are fairly good

  • Searching for data: Web search enginesSearch for GIS & data & Washingtonresults are NOT good

  • Searching for data: Web search enginesWhy are web search engines not the best tool for searching GIS data?Search engine indexes are created by spidersSpiders only find and index keywords, not meaningSearching for keywords is not efficientToo many erroneous matchesNot a true database queryNo spatial coordinates in normal search enginesToo many dead ends and broken linksNo standard format for searching various engines_

  • OverviewSearching for dataWeb search enginesNSDI Geospatial Data ClearinghouseUSGS GeoData siteThe Geography NetworkUniversity of Washington Map Library Geospatial Data Archive (WAGDA)GIS Data Depot

  • Searching for data: NSDIBetter/more efficient methods are needed for obtaining GIS dataFederal Geospatial Data Committee (FGDC)Federal agency with mission to increase access/use of geospatial dataNational Spatial Data Infrastructure ( NSDI)Coordinated effort among many participants_

  • Searching for data: NSDI GDCNSDI Geospatial Data ClearinghouseBuilt on a distributed databaseDatabase is Z39.50 compliant (international library standard)Queries are run against specific fields rather than as simple keywordsFields are specifically for geospatial data description

  • Searching for data: NSDI GDCSpecific GDC server network built on top of the NetworkUse of common search engineMetadata (data about data = data description files) are the keystone_

  • Searching for data: NSDI GDC: MetadataContent-standardized metadata is the foundation of a robust searching toolRecords for individual data sets contain data for specific fields, e.g., TitleAbstractSpatial extent, projection, coordinate systemData typeCurrency of time scaleSource scaleDeveloper/Contact information_

  • Searching for data: NSDI GDC: Indexed databasesMetadata records are indexed into international library standard (Z39.50 protocol) databasesSpecific sites containing indexes (nodes) are registered with search server sitesSearching functions are embedded in web interfacesSearches can be limited to individual nodes or to many nodesDatabases are searchable across TCP/IP networks (web, simple terminal)Results are displayed in web pages_

  • Searching for data: NSDI GDC: SearchingSearch by place name or geographic location

  • Searching for data: NSDI GDC: SearchingSearch by time period or various other fields

  • Searching for data: NSDI GDC: SearchingSelect node to search

  • Searching for data: NSDI GDC: ResultsNumber of hits is displayed

  • Searching for data: NSDI GDC: ResultsIndividual record titles can be viewed

  • Searching for data: NSDI GDC: ResultsIndividual records can be read

  • Searching for data: NSDI GDC: ResultsDistribution information is always included

  • Searching for data: NSDI GDC: ResultsDrawbacks:Content is not up to dateMetadata records have no requirement to provide actual data sets!Links may be bad_

  • OverviewSearching for dataWeb search enginesNSDI Geospatial Data ClearinghouseUSGS GeoData siteThe Geography NetworkUniversity of Washington Map Library Geospatial Data Archive (WAGDA)GIS Data Depot

  • USGS Data Organization

  • Searching for data: USGS GeoData siteA tremendous amount of data area available for freeData sets representing USGS topographic quadranglesData from paper maps converted to digital formatDEM (raster elevation) dataVector data for a variety of themesVariety of source scales_

  • Searching for data: USGS GeoData site7.5 (1:24,000) topographic quadrangle vector data series

  • Searching for data: USGS GeoData site: DownloadingInteractive searching

  • Searching for data: USGS GeoData site: DownloadingInteractive searching

  • Searching for data: USGS GeoData site: DownloadingInteractive searching

  • Searching for data: USGS GeoData site: DownloadingIndividual files for a quad can be downloaded

  • Individual files for a quadAvailable files are listed

  • OverviewSearching for dataWeb search enginesNSDI Geospatial Data ClearinghouseUSGS GeoData siteThe Geography NetworkUniversity of Washington Map Library Geospatial Data Archive (WAGDA)GIS Data Depot

  • The Geography NetworkThe Geography NetworkServer network built on ESRI technologySearchableSome data available for downloadSome freeSome at a costMuch live data

  • The Geography NetworkSearching

  • The Geography NetworkUsing live data from the Geography Network

  • OverviewSearching for dataWeb search enginesNSDI Geospatial Data ClearinghouseUSGS GeoData siteThe Geography NetworkUniversity of Washington Map Library Geospatial Data Archive (WAGDA)GIS Data Depot

  • Searching for data: University of Washington Map Library Geospatial Data Archive wagda.lib.washington.eduStaffed by GIS LibrariansShould be your first stop when searching for GIS dataDepository library Suzzallo Library basementData repository for Washington and PNW dataOn-line and off-line data setsCity of Seattle GIS database10 m USGS DEMsLarge collection of paper maps & aerial photos_

  • Searching for data: WAGDA Web pageMain WAGDA site

  • Searching for data: WAGDA Web pageGeospatial data for the Northwest

  • Files on WAGDAExample: Seattle data

  • Files on WAGDAExample: Seattle data

  • OverviewSearching for dataWeb search enginesNSDI Geospatial Data ClearinghouseUSGS GeoData siteThe Geography NetworkUniversity of Washington Map Library Geospatial Data ArchiveGIS Data Depot

  • GIS Data DepotGIS Data Depot: www.gisdatadepot.comLots of free dataUS dataWorldwide dataOfficial source for USGS DEM data sets

  • GIS Data Depot

  • GIS Data DepotGIS Data Depot

  • GIS Data DepotGIS Data Depot

  • OverviewImporting dataArcInfo interchange fileArcInfo generate fileSpatial Data Transfer Standard (SDTS) filesUSGS DEM (raster) dataUSGS DLG (vector) data DRG_

  • OverviewImporting dataArcInfo interchange fileArcInfo generate fileSpatial Data Transfer Standard (SDTS) filesUSGS DEM (raster) dataUSGS DLG (vector) data_DRG_

  • Importing data: ArcInfo interchange fileArcInfo has been a leading software Very common file format for movement of dataKnown as interchange, export, or E00 fileSolves ArcInfo file system problem for data sharingEasy to transfer from machine to machine or across file system; easy to distribute via the NetworkCan be imported to ArcMap

  • Importing data: ArcInfo file structureDistributed file layout of ArcInfo coverage

  • Importing data: ArcInfo file structureProblematic file structure for file managementDirectories for ArcInfo data sets cannot be altered, copied, or moved arbitrarilyInterchange file packages the coverage directory and info files into a single file_Interchange file can be copied or moved and then importedImporting recreates original file structure_

  • Importing data: ArcInfo file structure: ArcToolboxImport with ArcToolbox

  • OverviewImporting dataArcInfo interchange fileArcInfo generate fileSpatial Data Transfer Standard (SDTS) filesUSGS DEM (raster) dataUSGS DLG (vector) data DRG_

  • ArcInfo generate fileASCII coordinates in formatted file created by ArcInfo Workstation

  • ArcInfo generate fileImported with ArcCatalog

  • OverviewImporting dataArcInfo interchange fileArcInfo generate fileSpatial Data Transfer Standard (SDTS) filesUSGS DEM (raster) dataUSGS DLG (vector) data (*.ddf)DRG_

  • Importing data: SDTS filesSpatial Data Transfer StandardPublicly available data setsDistributed by USGS in SDTS file formatUSGS digital elevation model (DEM) dataUSGS digital line graph (DLG) vector data_

  • Importing data: SDTS files: USGS DEM dataImported with ArcToolbox

  • OverviewImporting dataArcInfo interchange fileArcInfo generate fileSpatial Data Transfer Standard (SDTS) filesUSGS DEM (raster) dataUSGS DLG (vector) data DRG_

  • Importing data: SDTS files: USGS DLG dataDigital Line Graph (DLG)Vector format dataPublicly available data setsDistributed in SDTS file formatArcInfo Workstation needed for full conversion of SDTS to GIS data sets_

  • Importing data: SDTS files: Importing STDS DLG to DXFArcToolbox import

  • Importing data: SDTS files: DLG to ArcInfo coverageArcInfo Workstation for full conversion

  • Importing data: SDTS files: DLG to ArcInfo coverageFully converted data set has full attribute coding

  • OverviewImporting dataArcInfo interchange fileArcInfo generate fileSpatial Data Transfer Standard (SDTS) filesUSGS DEM (raster) dataUSGS DLG (vector) data DRG_

  • DRGDigital Raster Graphic (DRG)USGS topographic quadranglesScannedGeoreferencedTIFF format_

  • DRGDigital Raster Graphic