Not all maps are appropriate as a source of information for GIS The type of map

Not all maps are appropriate as a source of

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Not all maps are appropriate as a source of information for GIS The type of map and how it was produced, and the intended purpose must be considered when interpreting the information on maps
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Data capture Geographic data conveniently classified as Primary and secondary data Primary Geographic data sources: Captured specifically for use in GIS by direct measurement Examples include: Digital Aerial photos,Digital RS images- Raster Survey measurements,GPS measurements - Vector Secondary Geographic data sources: Data collected for other use and reused Examples: Scanned maps, photographs, DEM from maps raster data Topo maps, Place names - Vector
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Processes Outline Project identification Planning / consultancy and design Data Collection Data Capture Image processing/ manipulation Georeferencing Digitizing Map Editing Attribute entry Adding Labels (Text placement) Map symbolization Preparation of Map Layout and map output
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Planning, Consultancy & Map design - Consultative meetings/Map design - Identification of processes/activities/tasks - Identification of personnel - Identification of source data - Database design (fields and records items) -Design Implementation (symbols, text, colour etc) - Identification of appropriate software and hardware - Budgeting cost in man-hours - Preparation of a work schedule - Preparation of a flow diagram work flow
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Implementing the Process Data collection Satellite Image, Aerial Photo, Existing maps, digital data etc Data Evaluation and Compilation Sort the relevant data Preparation of working environment Create working Environment etc Data Capture Scanning Digitization Image cleaning/enhancement/processing Use available/appropriate software Georeferencing Geocoding/Image registration
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…… the Processes Cropping/Clipping Identify and delineate AOI Digitization Image Interpretation (use interpretation elements ) Capture the
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  • Spring '16
  • prof. Maximillan tumbo

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