Project Based GIS - Notes 2019
Project Based GIS - Notes 2019
♦ Section Overview
- Objectives of planning
- Tomlinson method (formal)
- Fay method (informal/scaled for class)
- Workspace
- Identify objectives: data, analysis, products
- Gather data
- Analysis
- Communicate results
- Evaluate impact (success?)
- Example: Pipeline analysis (class exercise)
- Initial ask is vague -> need to clarify objectives
- Often involves sweeping assumptions!
- Data needs…
- Analysis…
- Deliverables…
- Schedule
♦ Geospatial Data
- Importance of data
- A key step in project based analysis
- Foundation in data->wisdom pyramid
- GIS & data
- GIS is key tool in moving data->wisdom pyramid
- GIS can’t fix bad data
- Approaches to finding data
- We now more find existing data than create
- But using existing data has a cost…
- Data formats - a refresher before we go into detaile
- Vector
- Raster
- Specific formats
- Obtaining data - strategies
- ASK: how would you search for data?
- Public domain data - Reliable, free, and vetted; but often OLD
- Google searches and the Internet Archive
- Topical data sets –> List
- Available data considerations
- Extent
- Scale and detail
- Scale and accuracy
- Format
- Raster data sources
- Images vs rasters
- Satellite/remotely sensed data
- Need for processing
- Sometimes need for georegistration
- Scanned maps
- Photos
- Thematic rasters, e.g. land cover
- Spatial resolution
- Temporal resolution
- Thematic resolution
- Source/Agency collecting it (bias?)