Earthsys 144: Fundamentals of GIScience

Digitizing Spatial Data

where is your data? gis.stanford.edu

https://slides.com/staceymaples/digitizingdata

Hardcopy Sources

https://slides.com/staceymaples/digitizingdata

On-Screen/Head's Up Digitization

Feature Generalization

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

How long is the coast of Britain?

Errors

Undershoots  & Overshoots

Node & Line Snapping

Reshaping

Error Across Layers

Resampling Raster Geometries

Let's talk about this Final Project Proposal

What your proposal should include:

  • Spatial Question or Project Idea
  • Bibliography of any published work you are referencing
  • Brief description of the way you might answer your question
  • Data Sources that you have identified as useful and type (digital, scanned maps, tabular, etc...)
  • Software or platform you are interested in using
  • What will the final product be (web map, datasets, print maps, etc...)

1 page, or 500 words!

Places to get ideas:

  • Your other classes! Double-up!
  • Your thesis, paper, current research, etc...
  • A need in your community that can be addresses with spatial data
  • Write a tutorial!
  • Esri Map Book
  • learn.arcgis.com - use one of these workflows for a place you are interested in (bonus for converting to a QGIS or GEE workflow!)

The most important component of your project is that you bring YOUR interest to it!

Spatial Data Sources

https://slides.com/staceymaples/digitizingdata

LMGTFY

 

"Clown Data Shapefile"

 

geotiff

geojson

geodatabase

etc...

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

NAIP

National Aerial Imagery Program

https://slides.com/staceymaples/digitizingdata

NLCD

National Landcover Database

https://slides.com/staceymaples/digitizingdata

NASS CDL

National Agricultural Statistical Service Crop Data Layer

https://slides.com/staceymaples/digitizingdata

https://slides.com/staceymaples/digitizingdata

USDA Soils data