GEOG 93GIS Analysis & Web App

Future Development of Natural LandIn West Placer County

Where will future development overtake natural, open space, and agricultural landscapes in west Placer County?● ● What natural resources are most at risk? What cities

will experience the greatest loss of natural land?–

– My analysis used zoning and land cover data to

– determine areas of development vs. open space.–

– The end products are two published web apps.

What is “ development ”

● Challenge #1: Development has multiple meanings.

●

● Technically, any man-made change in the natural

● landscape is development, including agriculture and

● parks. Yet communities often consider such areas to be

● “open space,” part of the effort in conservation.

●

● My definition: Urbanization that constructs buildings

● over what was once mostly open or natural landcover.

Developed vs. Undeveloped Land

● Rural Residential● Rural Residential Forested● Urban Golf Courses● Urban/Suburban

● Urban/Suburban

Development Analysis 1 Development Analysis 2

Forecasting the Future

● Current development/open space is determined by

● land cover designation.

● Data from Placer County.●

● Current and future development is determined by

● zoning designations.

● Data from Placer County and cities of Roseville, Rocklin, Lincoln, Auburn, and Loomis.

●

● To find future development, I will overlay zoning and

● land cover. BUT before that happens . . .

Georeferencing Maps &Digitizing Zoning Data

Lincoln Zoning Map

Digitizing Development Areas Present & Future Development Zones:City of Lincoln

1. Convert PDF into image file2. Georeference map3. Create geodatabase & feature class for

an edit session4. Digitize areas zoned for development

Digitizing Challenges

● 1. Cutting out “holes” in my polygons for open space

● Solution: I digitized individual polygons for each open

● space & cut them out using the Clip tool (Editor toolbar).●

● 2. Accidentally completing a polygon too soon

● Solution: I unintentionally double-clicked the polygon.

● Rather than using my laptop mouse pad, I switched to a

● physical mouse that gave me a steadier hand digitizing.

Zoning Challenges

● ZONING is the bread and butter of my analysis.●

● 1. Zoning is different for each city and county.

– Different parameters for each “open space” zoning●

● 2. The same zoning category may allow both

● development and open space.

– Ex: Roseville's FW (Floodway) & FF (Floodway Fringe)

Back to the Future

● Already pinned down present & future development

● Directly digitized feature classes for Loomis, Lincoln, and Auburn

● Queried zoning data to create feature classes for Roseville, Rocklin, and Placer County

● Now to isolate future development:● Used Intersect tool with the following layers:

– present and future development– undeveloped land cover

Placer County Future Development

Used the Merge tool to combine all future development layers

Initial Problems:(1) One of the output attribute text fields had too short a character limit. I expanded the limit.

(2) Area fields became inaccurate. I didn't sum them in earlier steps. So I created new fields and calculated new geometry.

Red = future development Green = open spacePink = present development

Creating a Web App● i

● Uploaded layers into 10 ArcGIS online maps– Issue: 1000 feature limit for personal account. Solution: Trimmed

large datasets via digitizing and select-by-location● Created 2 web apps based off the 10 maps

– Story Map Series & Basic Viewer

● Selected symbology– Issue: Choosing colors to tell apart 25 types of land covers

● Configured pop-ups, refined datasets, & created charts

● Photographed land cover on field trips to add photos to Story Map Series

Learning Experiences● I

● My first time georeferencing & creating web apps!●

● Tons of digitizing!!!●

● Learned zoning, land cover types, and the difficulty

● in pinning down real-world data. Greater appreciation

● for our local natural landscapes.●

● Experienced the process of turning raw data into a

● finished product for the public.

Story Map Series: http://www.arcgis.com/apps/MapSeries/index.html?appid=a697db29a04748199e5e669f1a0b0c33

Basic Viewer: http://www.arcgis.com/apps/Viewer/index.html?appid=c88135c7978942bf98b53f482c8a4b76

Final Maps