| BASE.SJRWMD_SSURGO | |
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Data format: SDE Feature Class File or table name: BASE.SJRWMD_SSURGO Coordinate system: Albers Conical Equal Area |
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Abstract:
Coverage of detailed soils from the USDA/NRCS soil survey
maps which cover the following counties/areas: Alachua,
Baker, Bradford, Brevard, Clay, Duval, Flagler, Indian
River, Lake, Marion, Nassau, Okeechobee, Orange, Osceola,
Polk, Putnam, Seminole, St. Johns, and Volusia. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
Coverage of detailed soils from the USDA/NRCS soil survey
maps which cover the following counties/areas: Alachua,
Baker, Bradford, Brevard, Clay, Duval, Flagler, Indian
River, Lake, Marion, Nassau, Okeechobee, Orange, Osceola,
Polk, Putnam, Seminole, St. Johns, and Volusia.
publication date
From the metadata at SJRWMD office for SSURGO soils . . . WARNING! 10/07/00 - GIS Division staff have found problems with the individual DUVAL COUNTY soils coverage. We are working to resolve this problem. Until then, please use the Districtwide layer instead, or at least check the data for the area you are working in against the latest hardcopy soil survey. This metadata file will be updated again as soon as this problem is repaired. NOTES: Regarding the two joined coverages SOILS and SOILS2: (1)The coverages were created using the Arc union command. Unlike the command mapjoin, this approach ensured that each overlapping polygon along county boundaries carries at least one MUID (soil ID). (2) As a result of unioning, overlapping polygons along county boundaries could have two MUIDs. For all of them, they were checked against the survey books except for the little ones for which the discrepancy was resolved in a way that: if one of the two is water, then assign it as water, otherwise, inherited from the first input coverage. The overlapping little polygons were particularly obvious on the county lines along the St. Johns River. However, since they count only a very small (negligible) area and many of them are simply waters, this approach should not create major concerns for the overall dataset. However, data users are cautioned to consult the soils survey book when working on small project areas along county lines. (3) The coverages DO NOT edgematch across county boundaries. During the mapping phase of the data development process, soils scientists did not attempt to match the delineations developed for other counties. The South Florida Water Management District is alleviating this discrepancy in the data by contracting with an NRCS-approved soils scientist who is performing edgematching repairs. There is a possibility that SJRWMD can develop a similar work-order contract during fiscal year 1998. (4) In some cases, soil IDs from the county-based coverages were not listed in the comp table, which contains the attribute information. When the coverages were unioned, this resulted in soil polygons which could not be linked to any relevant information. In these cases, GIS Division staff consulted the hardcopy surveys to determine the correct soil ID, and revised the Districtwide coverage accordingly. Therefore, the Districtwide coverage is considered to be more accurate. Regarding the original county-based coverages: Mylar 1:24,000 quad manuscripts were created from NRCS soil surveys, which are based on unrectified aerial photography. The mylars were digitized, coded, and clipped to quad boxes. The District contracted to have many counties digitized. Digital soils datasets were obtained for Alachua, Bradford, and Polk counties from other Water Management Districts. Lake County soils data sets were obtained from Lake County. Indian River County soils were digitized directly from unrectified aerials, then "rubber sheeted" using control points from USGS 7.5 minute quads. Indian River County soils positional accuracy is suspect and was redigitized by NRCS to District-developed technical specifications. The SSURGO Soils data layer is made complex by the the depth of and difficulty in using the related attribute data. Full layer development and use facilitation has been a recurring topic for discussion. NRCS has indicated that they would develop soils MUID recompilation tables to map the MUID values to their correct attributes reliably and consistently and then provide educational assistance in using the data layer appropriately and effectively. The SSURGO Soils data layer will not be complete until these steps are taken. SJRWMD staff may review the "Soil Survey Geographic (SSURGO) Data Base - Data Use Information" (Miscellaneous Publication Number 1527), January 1995 document in the Division of GIS. Other data users may order this document from the United States Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center (NRCS) at: National Cartography and GIS Center USDA, Natural Resources Conservation Service P.O. Box 6567 Fort Worth, Texas 76115-0567 Phone: 817.334.5559 Fax: 817.334.5469
The 19 county area coverage was transfered electronically via an e00 file from SJRWMD district office. There were 1820 polygons missing Muids; mostly along the borders along each county. Twenty-five of the polygons were large enough to warrant having the data updated in ArcInfo using SFWMD, SWFWMD and the Geoplan's website data as sources for identifying the muids and other attributes for that particular soil. There are still about 2000 polygons that have missing data: some have the muids but do not have any other data associated with the muid. Others do not have any data associated with the polygons, these are mostly slivers where matching was difficult between counties. Data users, as always should check the latest hard copy soil survey book for verification.
Feature geometry.
ESRI
Internal feature number.
ESRI
ATTRIBUTE DESCRIPTION :
STSSAID: Includes the county code for identification
MUID: County and soil type codes
COMPNAME: Full name of the type of soil component and characteristics
MUSYM: Soil type code for soil identification corelates with the county code
SEQNUM: A number identifying the sequence of a component in a mapunit ie: the
first component has a sequence number of 1
COMPPCT: Percentage of the component of the mapunit
SLOPEL: Minimum soil slope range within a mapunit
SLOPEH: Maximum soil slope range within a mapunit
SURFTEX: Surface soil texture of the surface layer of horizon OTHERPH: Class Determining Phase Criteria other than slope and texture
COMPKIND: Component Kind identifies the kind of component in the mapunit (i.e.
S for series)
COMPACRE: Component Acres is the acreage of the component of the soil mapunit
ANFLOOD: Annual flooding frequency
ANFLOBEG: Annual Flooding Beginning month
ANFLOEND: Annual Flooding Ending month
WTDEPL: Water Table Depth minimum for the seasonal high water table
WTDEPH: Water Table Depth maximum for the seasonal high water table
WTKIND: Water Table Kind type of water table ie: APPAR (Apparent)
WTBEG: Water Table Begins month in which seasonal water table occurs at the
depth specified in a normal year
WTEND: Water Table Ends month in which seasonal water table occurs at the
depth specified in a normal year
PNDDEPL: Ponding Depth minimum depth of surface water ponding on the surface
PNDDEPH: Ponding Depth maximum depth of surface water ponding on the surface
PNDBEG: Ponding Begins month in which surface water ponding begins
PNDEND: Ponding Ends month in which surface water ponding ends
ROCKDEPL: Depth to Bedrock minimum expressed in inches
ROCKDEPH: Depth to Bedrock maximum expressed in inches
DRAINAGE: Identifies the natural drainage condition: refers to the frequency
and duration of periods when soil is free of saturation.
CORCON: Corrosion - Concrete susceptibility of uncoated concrete to corrosion
when in contact with the soil
CORSTEEL: Corrosion - Steel susceptibility of uncoated steel to corrosion when
in contact with the soil
HYDRIC: Hydric Soils Rating: Y/N symbol
HYDGRP: Hydrological Group
2600 Blair Stone Rd Twin Towers MS 6520