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
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 - PowerPoint PPT Presentation
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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