# Presentation: 577209

## Soil Data Viewer 5 for ArcGIS

- Steve Campbell
- USDA - Natural Resources Conservation Service
- Pacific Northwest Soil Survey Region
- Portland, Oregon
- E-mail:  steve.campbell@or.usda.gov
- Phone: 503-414-3009

## Overview of Soil Data Viewer

- Soil Data Viewer 5 is a tool built as an extension to ArcGIS  that allows a user to create soil-based thematic maps and reports.
- The soil survey attribute database associated with the spatial soils data is complicated, with more than 50 tables.
- The Soil Data Viewer provides users access to soil interpretations and soil properties while shielding them from the complexity of the soil database.

## Some Enhancements in Soil Data Viewer 5

- Improved ability to use locally developed interpretations
- More options for data filtering and aggregation
- “Tiebreaker” option when two components have the same component percentage.
- Reports generated in PDF format, which are easier to share with others.
- Units of measurement have been added to reports

## Challenges to Spatially Displaying Soils Data

- The SSURGO soil database has multiple “one to many relationships”.
- Most map units have more than one component, especially when minor components are included.
- Most components have multiple horizons.
- The Soil Data Viewer provides the user with a tool to deal with this complex database structure.

## After Soil Data Viewer is installed, it appears in the list of tools and extensions.

- When  Soil Data Viewer is checked, an icon appears that is used to start the program.

## Folders contain soil properties and interpretations arranged by major categories

- Soil Data Viewer 5 uses a SSURGO Access database that can be downloaded from the Soil Data Mart

## Clicking on the “+” next to the folder displays the available soil properties or interpretations.

- The arrow next to “T Factor indicates that it has been selected

- Soil Data Viewer 5 has “Basic” and “Advanced” modes.  The Advanced Mode has more data filtering and aggregation options than the Basic Mode.

## When a soil property or interpretation is selected, the “Description” tab displays a definition and other information

## The “Options” tab contains selections for aggregation method and other data filtering options.

## There are multiple options for data “Aggregation Method” in the Advanced Mode.

## The “Method Description” button will display a description of the aggregation method selected.

## Description of the “Dominant Condition” aggregation method

## Dominant Soil vs. Dominant Condition

- Soil Map Unit 40:
- Bakeoven-Condon-Valby complex, 0-12% slopes
-  45% Bakeoven – T factor = 1
-  30% Condon - T factor = 2
-  25% Valby - T factor = 2
- Dominant Soil (Bakeoven - 45%) - T factor = 1
- Dominant Condition (Condon and Valby - 55%) -     T factor = 2

## The Component Percent Cutoff will exclude components below the specified percent composition.

- The Tiebreaker rule specifies which value is selected when there is a component composition tie.

## Click on the “Generate Map” button when the soil property and Advanced Mode Options have been selected.

## Slide 16

## Slide 17

## A report is produced in PDF format.  The report includes the Aggregation Method and the unit of measurement for numerical data.

## The Parameter Summary includes a definition and description of the soil property, units of measure, aggregation method, component percent cutoff, and tiebreak rule.

## For horizon data, the user can specify the depth range and units of measurement (centimeters or inches).

## Permeability Class - Aggregation Method is “Dominant Soil”. The Tiebreaker Rule is “slowest”. Depth range is 0-24 inches.

- Permeability Class - Aggregation Method is “Dominant Soil”. The Tiebreaker Rule is “slowest”. Depth range is 0-24 inches.

## Permeability Class map

- Permeability Class map
- Depth range is 0-24 inches.

## Forest Site Index  – Tree species and site index base are selected.  There is also an option of interpreting null values as zero.  

- Forest Site Index  – Tree species and site index base are selected.  There is also an option of interpreting null values as zero.

## Water Features - flooding frequency class, ponding frequency class, water table.  The month range to be evaluated can be selected.  Tiebreak Rule allows selection of more and less frequent class

- Water Features - flooding frequency class, ponding frequency class, water table.  The month range to be evaluated can be selected.  Tiebreak Rule allows selection of more and less frequent class

## Flooding Frequency map for the dominant soil during the months of March to October

- Flooding Frequency map for the dominant soil during the months of March to October

## Any Questions ???