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

FME Raster Formats

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

Raster & PointClouds

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

LAS Report Demo

Raster Chart creation:

Split point cloud by each color and

intensity

Use ChartGenerator, new transformer

in FME 2015.1

LAS Report Demo

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

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 Workspace

Flood Model Results

1 meter 2 meter

A Debate of The Year…

A World Wide Debate…

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

Thank You!