GDA Corp.

GIS Expert System for GIS Expert System for Riparian Buffer Delineation Riparian Buffer Delineation

and LC mappingand LC mapping

Riparian Buffer GIS MeetingAnnapolis, MD

February 6, 2007

Dmitry L. VarlyguinGDA Corp.

www.gdacorp.com

GDA Corp.

Current State of ArtCurrent State of Art

• SWs can do everything and more. I.e., they are generic

Why, after so many years of GIS and RS development, riparian buffer and LC mapping is still a difficult, time consuming, expensive, and not (always) accurate undertaking?

• pixel is the king

• spectral info is the focus, and typically the only focus

• one line of evidence

• temporal, resolution, & accuracy differences / mismatch among datasets

GDA Corp.

GDA Approach: RBMapperGDA Approach: RBMapper

• Task Specific GIS Expert System• Uses of Multiple Lines of Evidence

- Spectral- Spatial- Contextual / Pattern / Association- Ancillary Data

• Highly Automated yet Interactive• From Global to Scene Specific Knowledge Base

on LC Properties• Iterative, Hierarchical Self-Learning• Works with High-Resolution Imagery

GDA Corp.

RBMapperRBMapper• Maps separately various water classes

- streams / rivers- fresh water bodies (lakes, ponds)- salt water bodies

• Builds stream network• Maps water buffers

- simple, “flat surface” distance- true surface distance- from any water class or a combination of classes- from modeled maximum water extent

• Maps LC within the buffers- water, ground vegetation, forest / tree cover, bare ground- clouds and cloud shadows

• In process accuracy assessment and editing• Calculates various stats for each scene processed

GDA Corp.

RBMapperRBMapper

GDA Corp.

Ancillary WaterAncillary Water

Lake/Pond

River / Stream

Locations !?

GDA Corp.

RBMapper: WaterRBMapper: Water

GDA Corp.

RBMapper: BuffersRBMapper: Buffers

GDA Corp.

RBMapper: Max Water LevelRBMapper: Max Water Level

Rules:

- Bare soil / ground adjacent to water

- Within a specified max distance from the water

- Within a specified max height difference of the water area

GDA Corp.

RBMapper: VegetationRBMapper: Vegetation

GDA Corp.

RBMapper: Tree RBMapper: Tree vsvs Ground Veg Ground Veg

GDA Corp.

RBMapper: Forest FilterRBMapper: Forest Filter

GDA Corp.

Value Description

0 Background / no value

1 Stream / river water

2 Fresh water body

3 Salt water body

4 Water present in the ancillary dataset but not spectrally confirmed

5 Water spectrally detected but not confirmed by the ancillary datasets

6 Ground vegetation

7 Forest vegetation

8 Bare ground

9 Riparian buffer area

10 Cloud

11 Cloud shadow

RBMapper: Output LC ClassesRBMapper: Output LC Classes

GDA Corp.

Output statistics for input file C:\imagery\ikonos\po_47932_0000000\po_47932_pan_0000000.tif

Report generated on Tue Jan 30 17:47:47 2007------------------------------------------------------------Landcover percentages for identified buffer area in footprint:

Total buffer area (square meters): 12902736.00Percent forest: 67.21Percent ground vegetation: 13.70Percent bare ground: 19.08

------------------------------------------------------------Landcover percentages for pixels adjacent to water in footprint:

Total area (square meters): 702048.00Percent forest: 81.70Percent ground vegetation: 9.21Percent bare ground: 9.10Number of gaps: 923Min / Mean / Max gap size (4m x 4m pixels): 1, 8.71, 212

------------------------------------------------------------Buffer generation settings:

Buffer radius: 100 metersWater type(s) buffered from: Streams Distance measure using: True surface distanceDistance measured from: Max water level

RBMapper: Output StatsRBMapper: Output Stats

GDA Corp.

Introduction of a more detailed LC classification Enhancement of statistical analysis Extension to other imagery Offering services for riparian buffer delineation and LC mapping RBMapper licensing

RBMapper: Plans RBMapper: Plans

GDA Corp.

GDA Corp.Innovation Park at Penn State University200 Innovation Blvd., Suite 234State College, PA 16803tel: 814-237-4060fax: 814-689-3375email: dmitry@gdacorp.com web: www.gdacorp.com

For More InformationFor More Informationhttp://www.gdacorp.com/projects/RBMapper.html

* To obtain a demo copy of RBMapper, * with questions and comments about the

• RBMapper software, • RBMapper licensing, and • GDA services for riparian buffer delineation and LC mapping

please contact GDA Corp. at RBMapper@GDAcorp.com