United States Geological Survey, and Natural Resource Conservation S, 20020530, Digital Overlay for Soils of St. Landry Parish, Louisiana.: USGS BRD's National Wetlands Research Center, Lafayette, Louisiana, US.
Planar coordinates are encoded using Coordinate Pair
Abscissae (x-coordinates) are specified to the nearest .61
Ordinates (y-coordinates) are specified to the nearest .61
Planar coordinates are specified in Meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is GRS 1980.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.257.
| Value | Definition |
|---|---|
| AdB (Ac) | Acadia Silt Loam, 1 to 3 Percent Slopes |
| Bd | Baldwin Silty Clay Loam |
| Bh | Bladwin-Sharkey Complex, Gently Undulating |
| BL | Basile and Wrightsville Soils, Frequently Flooded |
| BSA (new) | Basile and Brule Soils, 0 to 3 Percent Slopes, Frequently Flooded |
| Cc | Calhoun Silt Loam |
| Cd | Commerce Silt Loam |
| CE | Commerce and Convent Soils, Gently Undulating, Frequently Flooded |
| Cf | Convent Very Fine Sandy Loam |
| Ch | Convent Very Fine Sandy Loam, Gently Undulating |
| Ck | Convent-Commerce Complex, Gently Undulating, Occasionally Flooded |
| Co | Coteau Silt Loam, 0 to 1 Percent Slopes |
| Cp | Coteau Silt Loam, 1 to 3 Percent Slopes |
| Cw | Crowley Silt Loam |
| De | Dundee Silt Loam |
| Df | Dundee Silty Clay Loam |
| Dr | Dundee-Alligator Complex, Gently Undulating |
| Ds | Dundee-Sharkey Complex, Gently Undulating |
| DuB (new) | Duson Silt Loam |
| FA | Falaya Soils, Frequently Flooded |
| FE (FC) | Fausse and Sharkey Soils |
| FoA (Fo) | Frost Silt Loam |
| FrA (Fr) | Frost Silt Loam, Occasionally Flooded |
| Fz | Frozard Silt Loam |
| Ga | Gallion Silt Loam |
| Go | Gallion Silty Clay Loam |
| Gp | Gallion-Perry Complex, Gently Undulating |
| Ia | Iberia Clay |
| JeA (Je) | Jeanerette Silt Loam |
| Ju | Judice Silty Clay Loam |
| KvA (new) | Kinder-Vidrine Silt Loams, 0 to 1 Percent Slopes |
| La | Latanier Clay |
| Lb | Lebeau Clay |
| Lc | Lebeau Clay, Occasionally Flooded |
| Le | Loreauville Silt Loam |
| Lp | Loring Silt Loam, 1 to 5 Percent Slopes |
| Lr | Loring Silt Loam, 5 to 8 Percent Slopes |
| MaB (Ma) | Mamou Silt Loam, 1 to 3 Percent Slopes |
| Mc | Memphis Silt Loam, 0 to 1 Percent Slopes |
| MbC (Md) | Memphis Silt Loam, 1 to 5 Percent Slopes |
| Me | Memphis Silt Loam, 5 to 8 Percent Slopes |
| Mf | Memphis Silt Loam, 8 to 20 Percent Slopes |
| MtA (new) | Mowata Silt Loam, 0 to 1 Percent Slopes |
| Mt | Mowata Silt Loam |
| MU | Muskogee-Loring Association, 8 to 20 Percent Slopes, Severely Eroded |
| M-W (new) | Miscellaneous Water |
| PaA (Pa) | Patoutville Silt Loam, 0 to 1 Percent Slopes |
| PaB (Pb) | Patoutville Silt Loam, 1 to 3 Percent Slopes |
| PcA (new) | Patoutville-Crowley Silt Loams, 0 to 1 Percent Slopes |
| Pc | Patoutville-Crowley Complex |
| Pr | Perry Clay, Frequently Flooded |
| Sh | Sharkey Clay |
| Sp | Sharkey Clay, Frequently Flooded |
| So | Sharkey Clay, Occasionally Flooded |
| Ts | Tensas-Sharkey Complex, Gently Undulating |
| UD (new) | Udorthents |
| Wv | Wrightsville-Vidrine Complex |
| water | Water |
The NWRC acknowledges the NRCS for use of data derived from the SSURGO soils maps for St. Landry Parish, Louisiana.
USGS BRD's National Wetlands Research Center
c/o Steve Hartley
Senior Geographer/GIS Analyst
700 Cajundome Boulevard
Lafayette, Louisiana 70506
337-266-8543 (voice)
337-266-8616 (FAX)
steve_hartley@usgs.gov
- Hours_of_Service: 8:00 am to 4:00 pm CST Monday through Friday
To provide digital overlays of the soils of Louisiana by parish for the NRCS, that can be updated and used as a layer in a GIS application.
United States Department of Agr, in cooperation with the Louisiana , Unknown, Soil delineated aerial photography: USDA, NRCS, Alexandria, Louisiana.
USDA, NRCS, in cooperation with Louisiana A, 19780101, Soil Survey of St. Landry Parish, Louisiana: USDA, NRCS, Alexandria, Louisiana.
Earth Observation Satellite Company (EOSAT), 19930101, 1993 Landsat TM Imagery: EOSAT, Lanham, MD.
Satellite Pour L'Observation de la Terre (SPOT), 19900101 - 19950101, SPOT Imagery: Satellite Pour L'Observation de la Terre (SPOT), Toulouse, France.
National Digital Orthophoto Program (NDOP)., 19981125, Digital Orthophoto Quarter Quadrangles (DOQQ): USDA, NRCS, and National Cartography and Geospatial Center., Fort Worth, Texas.
The accuracy is not based on a formal quantitative assessment and was based on the judgement of the soil conservationist in the field. Ground truthing was not performed for this project. To attain a better estimate of accuracy, a formal re-evaluation of the soils of St. Landry Parish, Louisiana would be necessary to see if there are areas where discrepancies exist.
Not applicable
Not applicable
All data sets were derived in the same general format. All soil information was transferred onto transparent mylar sheets, for each topographic quadrangle in the parish, from the existing State Soils Survey for the parish. Mylar overlays were digitized (entered at an error of less than .005 for geographic positioning) and/or scanned then rectified. Each quadrangle mylar overlay was digitized and/or scanned separately and therefore may represent different amounts of human and/or equipment error. Parish coverage quadrangles land-water interfaces were corrected by best judgement on-screen digitizing to Digital Orthophoto Quarter Quadrangles (DOQQ's), if available. For parishes created before DOQQ's were available, the land-water interfaces were included on the mylar sheets. For parishes created after DOQQ's became available, the land-water interfaces were digitized on-screen separately from the soil lines; therefore they are not included on the mylar sheets. The land-water coverages and soil line coverages were then appended and cleaned to create the total quadrangle coverage. Each quadrangle was edited individually, and then all quadrangles in the parish were joined together. Once joined together, editing was done along all quadrangle boundaries to match lines and labels. When line or label errors were found, all corrections were made upon approval of the NRCS. Problems with labeling occurred along adjoining parish boundaries, due to different labeling conventions in each parish. A standard labeling convention system for the whole state of Louisiana must be created to remedy the problem. Until this standard is developed, the following labeling tactics have been used. New labels were created for parish coverages in order to match labels for adjoining parishes. Changes were dependent upon soil definition, polygon size, and cases of duplication problems. A duplication problem means the label already existed in the parish coverage and is a different unit altogether and therefore can not be added to that legend. New labels were also created when new lines were needed to reduce confusion. Lines were added in special cases: 1) if it was advantageous to extend an unit a small portion into the next parish, rather than renaming the whole polygon; and 2) if the two units adjoining are similar, differing only in transitional phase, then a line was added at the most logical area of transition, aided by imagery, in order to keep the two units separate. New labels were created in the coverages which the line was added as long as there was not duplication problems. If major complications occurred when trying to add labels, these areas were left as is, waiting for a standard soil convention. These problems can be fixed after a standard Louisiana State soil code convention is established. The attribute legend for St. Landry Parish is found in the Entity and Attribute Section. This includes current modifications for completeness with surrounding parishes. All changes to the St. Landry Parish soil lines and legend are documented in a report to be stored with the state soils archives at the NRCS in Alexandria, LA. Modifications to the St. Landry Parish include the following: The following soil codes changed to match Acadia; Ac to AdB, Fo to FoA, Fr to FrA, Je to JeA, Ma to MaB, Md to MbC, Pa to PaA, Pb to PaB; Added new soil codes BSA, DuB, KvA, MtA, PcA from Acadia; Added UD (Levee), a new addition requested by Louisiana's State Soil Scientist as an update; Changed soil code FC to FE, across many parishes; Added M-W (Miscellaneous water) replacing, for example, sewage ponds.
All polygons are closed, and have been cleaned in an editing environment. Adjacent polygons do not have identical attributes. Each polygon has one and only one attribute.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- It is strongly recommended that this data is directly acquired from the distributor described above or from another USGS Biological Resources Division server and not indirectly through other sources which may have changed the data in some way. The distributor makes no claims as to the data's suitability for other purposes.
- Use_Constraints:
- Acknowledgment of the NWRC as a data source would be appreciated in products developed from this data, and such acknowledgment as is standard for citation and legal practices for data source is expected by users of this data. Sharing new data layers developed directly from this data would also be appreciated by NWRC staff. Users should be aware that comparisons with other data sets for the same area from other time periods might be inaccurate due to inconsistencies resulting from changes in photo interpretation, mapping conventions, and digital processes over time. This data is not a legal document and is not to be used as such. This data is not STATSGO or SSURGO certified.
USGS BRD's National Wetlands Research Center
c/o Steve Hartley
Senior Geographer/GIS Analyst
700 Cajundome Blvd.
Lafayette, Louisiana 70506
USA
337-266-8543 (voice)
337-266-8616 (FAX)
steve_hartley@usgs.gov
- Hours_of_Service: 8:00 am to 4:00 pm CST Monday through Friday
NRCS Soil Maps for St. Landry Parish
Although this data has been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the accuracy or utility of the data or any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that this data is directly acquired from a USGS server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with this data. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein.
| Data format: | ARCE (version 7.1.0) |
|---|---|
| Network links: |
unknown |
Not available
Joan C. Kester
USGS BRD's National Wetlands Research Center
Geographer
700 Cajundome Blvd
Lafayette, LA 70506
USA
337-266-8611 (voice)
337-266-8616 (FAX)
joan_kester@usgs.gov
- Hours_of_Service: 8:00 am to 4:00 pm CST Monday thru Friday