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Presented by Lawrence Chong of Transport CanadaAbstract:Displaying a huge data set for Google Earth can be a challenge. The data must be properly processed for efficient display. Using FME, the KML output is structured using grouping, networklink, tiling and region for optimization.
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Optimizing Rail Data for Google EarthTM MashupLawrence ChongTechnical Data SupportTransport Canada
April 24, 2012
Optimizing Rail Data forGoogle EarthTM Mashup
OVERVIEW Preparing huge dataset for display in Google Earth can be a challenge. The
data must be properly structured for efficient display. Recent release of FME 2012 includes several transformer enhancements
specifically for KML translation. This presentation is to demonstrate how to achieve KML optimization using
Grouping, Tiling, NetworkLink, Folder, Region and Styling with FME.
Optimizing Rail Data forGoogle EarthTM Mashup
BACKGROUND Transport Canada (TC) is responsible for transportation policies and
programs. TC regulations, standards and programs work to ensure that air, marine,
road and rail transportation are safe, secure, efficient and environmentally responsible.
With 48,000 kilometres of tracks and over 25,000 road crossings, Canada has one of the largest rail networks in the world.
OBJECTIVE Implement a cost effective, efficient and portable system for viewing Rail
Data. Provide Rail Inspectors the visualization tool to access rail
information using Google EarthTM and Google Street ViewTM for planning, review and analysis, anywhere, anytime.
Google EarthTM and Google Street ViewTM are trademarks of Google Inc.
Optimizing Rail Data forGoogle EarthTM Mashup
Rail Data Mashup Layers Road Crossings Main Tracks Yards Spurs Crossing Collisions
Source: Google EarthTM and Google StreetTM View
Optimizing Rail Data forGoogle EarthTM Mashup
Basic FME Workflow
MS Access DatabaseExcel Spreadsheet
ESRI SHP FilesMapInfo TAB Files
RailData
Terminate
Fail
PassData
Integrity
• Date formatting
• Label formatting
• Attribute cleanup
DisplayError
KMLOptimization
• Grouping • Tiling
• NetworkLink• Folder
• Regioning
Styling
Symbolization
KML Output
Output to 5 folders grouped by TC
Regions
Verification
ValidationLevel 1
(Low LOD)
Multi-steps parallel processing to create data for various LOD utilizing thinning and
cluster sampling technique
Level 2
Level 3(High LOD)
KMLOptimization
KMLOptimization
FME Workbench for Road Crossings
CascadingNetworkLink(Level 3)
Level 1 (Low LOD)
Level 2
Level 3 (High LOD)
Casc
ad
ing
Fold
ers
(Levels
1 &
2)
Grouping
Tiling
ClusterSampling
LOD 1
LOD 2
LOD 3
Styling Regioning
Optimizing Rail Data forGoogle EarthTM Mashup
Style DefinitionKML OptimizationData Integrity Loading Output
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road CrossingsData Integrity
Original: yyyymmdd00000000000Formatted: yyyy-mm-dd
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road CrossingsKML Optimization – Cluster Sampling & Tiling
LOD 1Loading
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road CrossingsKML Optimization – Cluster Sampling & Tiling
LOD 2
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road CrossingsKML Optimization – Tiling
LOD 3
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road CrossingsKML Optimization – Step 1
CascadingFolder
Casca
din
g
Netw
orkLink
Cascading Folder• kml_document=Destination KML
document• kml_id=kml_name=Folder Label
Cascading NetworlLink• kml_link_href=Output KML file• kml_id=kml_name=NetworkLink label
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road Crossings
KML Optimization – Step 2
CascadingFolder
CascadingNetworkLink
Cascading Folder• kml_document=Destination KML
document• kml_parent=Previous Grouping (fanout)• kml_id=kml_name=Current Grouping
Cascading NetworlLink• kml_document=Previous Grouping
(fanout)• kml_link_href=Output KML file• kml_id=kml_name=NetworkLink label
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road Crossings
KML Optimization – Cascading Folder
Ste
p 2
Step 1
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road Crossings
KML Optimization – Cascading NetworkLink
Step
2
Ste
p 1
Styling Regioning
FME Workbench for Road Crossings
LOD 3(Street Level)Multiple files-NetworkLink structure
LOD 1(High Altitude)Single file-Folder structure
LOD 2Single file-Folder structure
Cascading Folder• kml_document=Destination KML
document• kml_parent=Previous Grouping (fanout)• kml_name=Placemark Label
Cascading NetworlLink• kml_document=Previous Grouping
(fanout)• kml_name=Placemark label
Optimizing Rail Data forGoogle EarthTM Mashup
KML OutputKML Optimization – Step 3
Optimizing Rail Data forGoogle EarthTM Mashup
FME Workbench for Road CrossingsStyle Definition
FME Workbench for Crossing Collisions
Styling
CascadingNetworkLink
RegioningGrouping
Tiling
Optimizing Rail Data forGoogle EarthTM Mashup
>
Style DefinitionKML OptimizationData Integrity Loading Output
FME Workbench for Rail Network
Grouping
Tiling
Casc
ad
ing
Netw
ork
Link
Regioning
Level 1 (Low LOD)Main Tracks
Level 2 (High LOD)Main Tracks
Level 3 (Street Level)Yards & Spurs
Styling
Optimizing Rail Data forGoogle EarthTM Mashup
Main Tracks
SpursYards
Style DefinitionKML OptimizationPre-processing Output
Optimizing Rail Data forGoogle EarthTM Mashup
Output
