Exploring Raster with FME

Agenda
 Raster Types & Workflows
 Raster and FME
 Formats
 Transformations
 Demos
 LAS Report
 Excel Image Writing
 Storm Tracker
 Flood Model

Typical Raster Users
• Land use planning
• Agriculture
• Environmental & resource
management
• Disaster response
• Security & Defense
• Weather forecasting
• Climate modeling
• Web mapping / mobile
devices

Raster Types
 Imagery
 Photographs
 Elevation models
 Reports
 charting
 Numeric models
 time series

Vector:
• Precise coordinates
• Many features
• eg. polygons
*Both can have attributes, use
common transforms, and interact
Raster:
• One/few grid features
• Approximate cell values
• eg. DEM grid
Raster vs. Vector
*Both can have attributes, use
common transforms, and interact

Raster Workflows
 Format conversion (tif to jpg)
 Loading (database import)
 Extraction (database export)
 Processing (transformations)
 Enriching GIS with raster (raster to vector)
 Publishing vector layers (vector to raster)
 3D workflows (draping, texturing, shading)
 Consuming from and publishing to web

Raster Transformations
 Resampling
 Reinterpretation
 Reprojection
 Mosaicking
 Tiling & clipping
 Georeferencing
 Surface modelling
 Vectorization
 Band & cell operations

Raster Bands
 What are Bands? Why important?
 Band Terminology
 Band Management
 Combining and Separating Bands
 Selecting Bands

Raster Terminology
 Band
 Palette
 Interleaving
 Origins and extents
 Data type / bit depth
 Numeric, color
 Compression(lzw,jpg)

Key to Format Conversion:
Interpretation
 Data Type
 Bit Depth
 Data Interpretation
 Palettes vs Bands
 RasterInterpretationCoercer
INT32 GRAY8 JPEG

Raster and Vector Interaction
Working with vector
and raster data
simultaneously

Raster Cell Manipulation & Algebra
Raster Cell Calculations:
 RasterCellValueReplacer
 RasterCellValueCalculator
 RasterExpressionEvaluator

Raster / Vector Interaction
& Cell Manipulation
 Flooded areas from
raster DEM
 RasterCellValueReplacer
 RasterToPolygonCoercer
 Generalization

Raster & 3D
 2.5D vs 3D
 Draping
 Appearances
 Surfaces, TINs

Read a LAS file and generate a report with:
 File name and location
 The extents and coordinate system
 Available components and other
information
 One top view and two perspective view
images
 Color and intensity distribution chart
LAS Report Demo

LAS Report Demo
Raster Chart creation:
 Split point cloud by each color and
intensity
 Use ChartGenerator, new transformer
in FME 2015.1

Raster to Excel writing
Water distribution QA example
 Read DWG file
 Pass through GeometryValidator
 For all errors, construct a URL to request
Google static map and mark the error on it
 Save the results to Excel

Raster to Excel writing
 Water distribution QA example

1. Create request features from
parameters
2. Read WMS-T for time step
3. Georeference and format for KML
4. Use KMLTimeSetter to set time
stamp per time step feature
5. Write to KML
Storm Tracker Demo: Workspace

Storm Tracker Demo: Workspace
http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r-t.cgi?SERVICE=WMS
&REQUEST=GetMap&LAYERS=nexrad-n0r-wmst&TIME=2015-02-01T03:00:00Z*

Storm Tracker Demo:
KML Output

Flood Model: Inputs
Raster DEM
2D River

 Read river vector and raster DEM
 Create river buffer in 2D
 Drape on DEM
 Convert river buffer areas to raster
DEM & elevate by flood height
 Use raster algebra to difference flood
level DEM from terrain DEM
 Convert flooded cells to polygons
(flood height > elevation)
 Write to 3DPDF
Flood Model Workflow

Flood Model Results
1 meter 2 meter

White And Gold
Or
Blue And Black?

Scientific approach
 Raster Analysis

A bit more about the debate
 http://www.dogonews.com/2015/3/6/w
hite-and-gold-or-blue-and-black-the-
great-dress-debate

 FME works with all kinds of raster data
 Full control of raster structures and values
 Convert between most formats
 Add value to raster through transformation
 Convert to / from vector
 Populate from point clouds and enrich 3D
 Consume from and publish to Web
FME & Raster: Take-Aways

Exploring Raster with FME

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