US Army Corps of EngineersBUILDING STRONG®

Natural Resource ManagementGIS ApplicationsBen Silvernail IWR20 April, 2017

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Geographic Information Systems (GIS) Utility

Collect Data Manage Data Join Data Process &

Analyze Data

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Spatial Data Collection

Field GPS►Appropriate grade►Plan what is to be mapped►Develop and import geodatabase►Log points or stream data for lines/polygons

*Planning and preparation are key!

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Geodatabase

Spatial Data CollectionPoints

Polylines

Polygons

Tables

Raster Datasets

Toolboxes

Layer Files

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Geodatabase

Spatial Data Collection• Features in a geodatabase will share a common

coordinate system.

• Database properties can be used to standardize common attributes pertaining to different feature classes.

• A developed schema can be imported or exported.

• Relationships between feature classes, tables can be stored.

• Representations of layers can be stored for consistent display.

• Can add address locator functionality.

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Pine Flat Lake, SPK

Black Butte Lake, SPK

Success Lake, SPK

Eastman Lake, SPK

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Spatial Data Collection

Examples of attributes collected in the field►Feature names and identifiers►Feature descriptions►Road material, width, striping►Building type►Fishing feature type►Marina ownership►Plus more…

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Spatial Data Management

Organize Standardize Evaluate Edit Share Describe

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Spatial Data Management

Demonstration of recreation boundary inventory

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Spatial Data Management - Metadata

Metadata creation/editing example

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Relational Data GIS is based on relational databases – with addition of

location information

Key fields (a.k.a. primary keys) are used to link information from one table to another

OMBIL/EDW, external sources

Spatial joins

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Relational Data

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Projects

Key Field

Campsites by Project

Boat Ramps by Project

Hiking Trail Miles by Project

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Relational Data

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Key Field

Districts Boat Ramps by District

Campsites by District Hiking Miles by District

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Processing Data

Query by location Reclassification Conversion Overlays Statistical calculations

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Processing Data – Spatial Query

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Processing Data – Reclassification

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Processing Data – Conversion & Raster Calculator

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Processing Data – Overlays

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Processing Data – Overlays

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Processing Data

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Analysis

Evaluate geoprocessing output Check for bias Index development Information vs Data

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II. I.

IV. III.Threats

Significance

I. High Threat/ High Significance

Action item Scale

Boundary survey•Correct errors•Find/reset corner monuments•Establish line

Annual requirement due to high number of adjacent landowners.

Boundary inspection•Visual on-site inspection•Aerial recon if topo and vegallow

Continual, ongoing work. Inspect entire boundary each year.

Boundary maintenance•Construct/repair fence/vehicle barriers•Replace signs/markers•Clear line of sight

One third of boundary needs routine maintenance every year.

Resolve encroachments•RE and OD costs to process and negotiate settlement of major and minor encroachments

An annual, recurring requirement to resolve major and minor encroachments

IV. Low Threat/ Low Significance

Action item Scale

Boundary survey Some survey work required onceevery 5-6 years

Boundary inspection Inspect 20% of boundary each year

Boundary maintenance Maintain 10% of boundary each year

Resolve encroachments Major encroachments rarely occur. Minor encroachments occur every 2-3 years.

Boundary Index

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Questions?

Ben SilvernailSocial ScientistUSACE Institute for Water Resourcesbenjamin.j.silvernail@usace.army.mil