MLRA Region 13

Core Geospatial Data Layers for Soil Survey Management Areas

• October, 2007 distribution to all MOs• Data sets delivered on a 1 Tb hard disk.• Original distribution included NED, SSURGO,

NHD, and miscellaneous (TeleAtlas) features• Distribution in file geodatabase format• SSURGO was current as of August, 2007• Elevation derivatives generated• Data were extracted for SSO areas

Core Geospatial Data Layers

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File Geodatabase Personal GeodatabaseNew to ArcGIS 9.2 Introduced in ArcGIS 8.x

1 Terabyte size limit 2 Gigabyte size limit

Stored in system folders in proprietary format

Stored as Access databases

.gdb extension .mdb extension

Cross-platform Windows only

Windows

ArcCatalog

Windows

ArcCatalog

Data contents

• Disk partitioned for National data sets and MO-wide data sets

• National Datasets– NED == 60.2 Gb– SSURGO == 79.1 Gb (33,678,443 polygons)– NHD == 8.8 Gb (16,859,511 vector records)

• MO-13 Datasets– NED == 7.1 Gb– SSURGO == 32.8 Gb (3,562,729 polygons)– NHD == 0.5 Gb (1,064,894 vector records)

Data provided to SSOsClipped to 50 km buffer of MMA

• USGS National Elevation Dataset (NED)– 30 meter DEM– Slope– Hillshade

• USGS National Hydrologic Dataset (NHD)– Streams– Water bodies

Data provided to SSOs

• Soils– SSURGO download from Soil Data Mart in

August, 2007– STATSGO– Soil Survey Area boundaries– National SSURGO Template tables imported

to file geodatabase format

Data provided to SSOs

• TeleAtlas data– Roads, streets, highways, railroads– Places– Postal boundaries – Census districts– Retail locations

Stuff you can and should do with data layers

• Explore relationships in the database

• Use them for developing work plans

• Analyze landscape and landform patterns

Stuff you shouldn’t do with core geospatial layers

• Edit line work

• Worry about topology

• Perform joins between survey areas

Any Questions?