Local Government Information Model
description
Transcript of Local Government Information Model
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Local Government Information Model
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Why?Supports data sharing between
local governments and regional, state, and federal agencies
Modern data structure following national standards
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Election App
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Property Value
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Service Request
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AdvantagesPlug-in Maps and Apps
◦App store for ArcGISSupport from ESRI
◦Apps and model move to latest release
Many organizations with same structure◦Shared enhancements◦Shared knowledge
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DisadvantagesLess customizationsAdds complexityRequires ArcGIS ServerTables and fields irellevant for
Atlanta areaYou must do it the ESRI way
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TransitionCurrent version requires ArcGIS
10Download layer package and
load into geodatabaseCreate temporary staging tablesLoad data into staging tables and
format for loadingLoad data from staging tables
into local government geodatabase
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Example AppsLocal Government basemapsInfrastructure Land RecordsElections Public SafetyPlanning and DevelopmentFacilities and Campus Public Works
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THE PARCEL FABRIC
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Parcel FabricMaintains dimensions of each
parcel separatelyStrict topology rulesUses least squares adjustment
and control points for spatial accuracy
Lines are used to create polygons
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Coincidental boundaries
87 ft
82 ftSame line from different surveys
45
46
Adjustments are based on accuracy of data
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When to use the Parcel FabricSpatial accuracy is critical
◦Parcels in the same layer have different levels of accuracy
◦Accuracy needs to get better with new accurate data
Layer has good topology before import
Each parcel needs to preserve its original geometry and history
You aren’t in a hurry
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When not to use the FabricQuick adjustments are requiredOriginal data isn’t cleanYou need easy access to parcel
layerNo ground control pointsWhat’s a COGO?
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Where is DeKalb Today?Migrated legacy data out of old
data modelInternal web maps using new
data modelReceived initial delivery of data
from parcel conversionTesting fabric with work flowsWaiting on ArcMap 10.1