PA Chapter of the American Planning Association Annual ... · PA Chapter of the American Planning...
Transcript of PA Chapter of the American Planning Association Annual ... · PA Chapter of the American Planning...
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PA Chapter of the American Planning Association Annual Conference, October 14-16, 2012
Brian Lawrence, Assistant Deputy Director, Westmoreland County Planning Department
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What is Google Earth? Naviga2ng Google Earth Examples • Public Sewage and Water Service Area Analysis • Walkability Assessment • New Alexandria Borough Build-‐Out Analysis Advantages/Disadvantages More resources
Planning with Google earth
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At its most basic: • Virtual, 3-‐Dimensional Globe • Satellite Imagery • AKA… a Geobrowser A geographic informa2on program (i.e. mapping program) that allows users to freely navigate the globe (among other geographies) and annotate features from a desktop pla0orm as a pc program
Planning with Google earth
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Keyhole Markup Language or KML or .KML • Just like Word or PowerPoint have files associated with them, so does GE. • The file format by which GE reads and outputs annota7ons (i.e. placemarks, polygons, paths, tours, overlays, etc.).
Planning with Google earth
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KMZ = KML(zipped) The KMZ file format is a zipped file that acts like a folder for the annota7ons A KMZ file will condense numerous KML’s, images and other annota2ons into a smaller file
Planning with Google earth
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Annota2ons:
Placemarks: points in space that iden2fy a par2cular (x, y) loca2on
Paths: lines in space that iden2fy a con2nuous series of (x, y + x, y + …) loca2ons to create a single feature
Polygons: areas in space that iden2fy 2-‐dimensional loca2ons that consume space
Planning with Google earth
COMPLEXITY
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Annota2ons:
Tours: recordings of your movements or along a path
Photos: images that can be inserted into any view within GE
Image Overlays: drape an image over the virtual globe surface
Planning with Google earth
COMPLEXITY
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Annota2ons:
Models: 3-‐D figures that can be created in other programs (Google SketchUp) and uploaded to complement the 3-‐D virtual globe Network Links: aren’t true annota2ons. They allow a content producer to hold data at a remote loca2on for local viewing (like every web page).
Planning with Google earth
COMPLEXITY
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Info Balloons: Descrip2ve HTML balloons that appear when an annota2on is clicked in the Places Panel One of the most powerful tools in Google Earth. Allows a user to communicate more informa2on than merely spa2al.
Planning with Google earth
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Planning with Google earth Tool Bar Menu Bar
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GE has many great a]ributes, however just as a cartographer must consider limita2ons of GIS, one must make considera2ons for GE’s limita2ons
Planning with Google earth
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FREE!!! 3-‐D Simple to learn and operate Dynamic scaling and views Plays well with GIS, Export to KML tool Files are much smaller and easier to share
Planning with Google earth
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Street View Incorpora2on with Google Maps & online mapping, Sketchup, CommunityViz, Google Fusion Tables, ArcGIS Online, Google Spreadsheet Mapper Take it with you on your smart phone With Google, possibili2es are endless
Planning with Google earth
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Poor print quality Poor analy2cal capabili2es Poor thema2c mapping capabili2es Google Earth Pro $400 Basemaps are limited to aerial imagery, there are workarounds Quality of aerial imagery varies by year, season, geography and resolu2on
Planning with Google earth
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Limits on the number of features that can be exported and successfully viewed from ArcMap Computer, projector and screen are necessary to present, and possibly internet
Planning with Google earth
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Simplis2c approach to mapping and geographic visualiza2on reduces barriers to geographic communica2on and offers unique opportuni2es versus other technology, but…leads to poorer func2onality and customiza2on
Planning with Google earth
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Google Earth Tutorials & More • support.google.com/earth Google Earth Blog; • gearthblog.com Google Earth Library; Topo Maps & More Overlays • gelib.com Google IT!
Planning with Google earth