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GIS data sources

GIS data sources. Data capture and compilation is very time consuming and costly Up to 80% cost of a GIS (Longley et al.) Primary Data – data captured specifically for use in GIS Remote sensing (satellite image, LIDAR, multibeam survey), GPS, digital aerial photographs

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GIS data sources

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  1. GIS data sources • Data capture and compilation is very time consuming and costly • Up to 80% cost of a GIS (Longley et al.) • Primary Data – data captured specifically for use in GIS • Remote sensing (satellite image, LIDAR, multibeam survey), GPS, digital aerial photographs • Secondary Data - data reused from earlier sources - • DEMS from topographic map contours, scanned paper maps

  2. Commercial Sources • ESRI Geography Network - free • http://www.geographynetwork.com/data/index.html • GeoCommunity - free • http://www.geocomm.com/ • Tele Atlas North America - pay • Road network database • Digital Globe -pay • High resolution imagery

  3. Federal Data Sources (public data) • Geospatial One-Stop http://www.geodata.gov/ • Nationwide public data • U.S. Geological Survey • Biological, geologic, water, DEM, topographic, land cover, cultural base maps • http://seamless.usgs.gov/ • U.S. Census Bureau • Census boundaries • http://www.census.gov/geo/www/index.html

  4. Data Sources for California CEIC – California Environmental Information Catalog CaSIL – California Spatial Information Library CA Watershed Portal Seafloor Mapping Lab (CSUMB)

  5. Data Sources for California CEIC California Environmental Information Catalog (aka CERES metadata catalog) • web based catalog • GIS data, EIR, General Plans, Administrative reports • stores metadata – not the actual data • Over 250 participants from federal, state, local, academic, private industry

  6. Data Sources for California CaSIL – California Spatial Information Library common statewide GIS data roads, administrative boundaries, counties, imagery, topographic maps data accessible from web site

  7. Data Sources for California CA Watershed Portal • Watershed activities • Access to data and information • Watershed community data accessible from web site

  8. Data Sources for California Seafloor Mapping Lab CSUMB Nearshore Marine Data • Acoustic Remote Sensing • Multibeam Bathymetry • Backscatter, Side Scan Sonar • Geologic and Substrate Interpretation data accessible from web site

  9. Data Sources for California CCJDC Central Coast Joint Data Committee Association of Monterey Bay Area Government • Regional GIS data sharing group (San Mateo, Santa Cruz, San Benito, Monterey) Local resource of GIS activities and data

  10. Creating New Data • Field Data • GPS positions • Survey (distance, direction, elevation) primarily for defining parcel boundaries • Text Files – x,y coordinates (weather stations, earthquake epicenter) • Digitizing - create new vector features • Scanning - convert paper maps to raster of vector file

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