Web Soil Survey&

Topographic Maps

Jerry WeinrichLincoln County SWCD

Charlie PerkinsSt. Charles SWCD

Web Soil Survey

• Available on-line• http://websoilsurvey.nrcs.usda.gov/app/

WebSoilSurvey.aspx• Very useful – no need to find in soil survey

book• Can search the whole United States• All information in Soil Survey Book is

located on-line, just have to navigate to it.• Will ‘Time-out’ – you will need to start over.

AOI

• Must chose an AOI (Area of Interest) to go any further.

• AOI must be 10,000 ac or less.

Soil Data Veiwer

• Choose a category on left side• Click on View Rating• Can choose Printable Version – ends up at

least three pages long. Map, map legend and chart.

T FactorSoil Data E(not to scale)

Quiz Time!!!!!!!

• What soil type is under the building we are in?• What is the “T” factor for this soil type?• What is the rating for the Suitability for Roads?• If I wanted to build a road around this parking lot,

according to soil types, would it be better on the west or east side?

• In this AOI, what % could be restored to a savanna?

• How big is the lake you passed, coming to this building?

TOPO Maps

• http://map.sccmo.org/Main/• www.cares.missouri.edu• Layer - Base Map - Aerial: • Layer >> Topography >> Zoom to location• 10 foot contour lines

Other Info from this site

• Can find other things about County• General Reference • Transportation• Parks And Recreation • Physical Features

Topo Model

• Fill colored water 1cm at a time• Draw line on top at water level• Try to look down at the same angle each

time• Continue until you get to the 8cm level.• You can alternate different colors for each

level• Each line will represent a contour interval

Completed Contours

Contours with Elevations

Clinometer

• Do not have to have a specified distance• Look at something the same height as you

eyes• Keep both eyes open • Read % slope on the right side of display• Typically will be displayed in whole

numbers

Clinometer