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Data format: SDE Feature Class File or table name: SBCSDE.GIO.soils Coordinate system: Lambert Conformal Conic Theme keywords: soil survey, soils, Soil Survey Geographic, SSURGO |
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Abstract:
THIS IS A MODIFIED DATASET ORIGINALLY COMPILED BY THE UNITED STATES DEPARTMENT OF AGRICULTURE (USDA), NATURAL RESOURCES CONSERVATION SERVICE (NRCS). THE MODIFICATIONS MADE BY COUNTY OF SANTA BARBARA PLANNING & DEVELOPMENT CONSIST OF MERGING THREE SEPARATE NRCS DATASETS: NORTHERN SANTA BARBARA AREA, SANTA BARBARA COUNTY CA SOUTH COASTAL PART, AND LOS PADRES NATIONAL FOREST AREA CA TO CREATE A SINGLE EXTENT TO COVER SANTA BARBARA COUNTY. MANY FIELDS OF DATA WERE ALSO REMOVED FROM THE ORIGINAL NRCS ATTRIBUTE TABLE (.DBF FILE) DEEMED UNNECESSARY AND TO DECREASE STORAGE SIZE.
FOLLOWING IS THE ORIGINAL ABSTRACT METADATA FROM NRCS:
This data set is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information.
This data set consists of georeferenced digital map data and computerized attribute data. The map data are in a soil survey area extent format and include a detailed, field verified inventory of soils and miscellaneous areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. A special soil features layer (point and line features) is optional. This layer displays the location of features too small to delineate at the mapping scale, but they are large enough and contrasting enough to significantly influence use and management. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties. |
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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.
THIS IS A MODIFIED DATASET ORIGINALLY COMPILED BY THE UNITED STATES DEPARTMENT OF AGRICULTURE (USDA), NATURAL RESOURCES CONSERVATION SERVICE (NRCS). THE MODIFICATIONS MADE BY COUNTY OF SANTA BARBARA PLANNING & DEVELOPMENT CONSIST OF MERGING THREE SEPARATE NRCS DATASETS: NORTHERN SANTA BARBARA AREA, SANTA BARBARA COUNTY CA SOUTH COASTAL PART, AND LOS PADRES NATIONAL FOREST AREA CA TO CREATE A SINGLE EXTENT TO COVER SANTA BARBARA COUNTY. MANY FIELDS OF DATA WERE ALSO REMOVED FROM THE ORIGINAL NRCS ATTRIBUTE TABLE (.DBF FILE) DEEMED UNNECESSARY AND TO DECREASE STORAGE SIZE. FOLLOWING IS THE ORIGINAL ABSTRACT METADATA FROM NRCS: This data set is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information. This data set consists of georeferenced digital map data and computerized attribute data. The map data are in a soil survey area extent format and include a detailed, field verified inventory of soils and miscellaneous areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. A special soil features layer (point and line features) is optional. This layer displays the location of features too small to delineate at the mapping scale, but they are large enough and contrasting enough to significantly influence use and management. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties.
SSURGO depicts information about the kinds and distribution of soils on the landscape. The soil map and data used in the SSURGO product were prepared by soil scientists as part of the National Cooperative Soil Survey.
AS THIS DATASET IS MERGED FROM THREE SEPARATE DATASETS CREATED BY THE USDA NRCS WE REFER THE USER TO THE ORIGINAL NRCS SEPARATE DATASETS METADATA FOR COMPLETE DESCRIPTION OF THESE SEPARATE DATASETS: Northern Santa Barbara Area, California, http://soildatamart.nrcs.usda.gov/Metadata.aspx?Survey=CA672&UseState=CA Santa Barbara County, California, South Coastal Part, http://soildatamart.nrcs.usda.gov/Metadata.aspx?Survey=CA673&UseState=CA Los Padres National Forest Area, California, http://soildatamart.nrcs.usda.gov/Metadata.aspx?Survey=CA772&UseState=CA FOLLOWING IS THE ORIGINAL SUPPLEMENTAL INFORMATION METADATA CREATED BY NRCS FOR THESE DATASETS: Digital versions of hydrography, cultural features, and other associated layers that are not part of the SSURGO data set may be available from the primary organization listed in the Point of Contact.
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The U.S. Department of Agriculture, Natural Resources Conservation Service, should be acknowledged as the data source in products derived from these data. This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions that they make. The Natural Resources Conservation Service will not perform any evaluations of these maps for purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than at which they were originally mapped can cause misinterpretation of the data. If enlarged, maps do not show the small areas of contrasting soils that could have been shown at a larger scale. The depicted soil boundaries, interpretations, and analysis derived from them do not eliminate the need for onsite sampling, testing, and detailed study of specific sites for intensive uses. Thus, these data and their interpretations are intended for planning purposes only. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data.
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California State Office
Attribute accuracy is tested by manual comparison of the source with hard copy plots and/or symbolized display of the map data on an interactive computer graphic system. Selected attributes that cannot be visually verified on plots or on screen are interactively queried and verified on screen. In addition, the attributes are tested against a master set of valid attributes. All attribute data conform to the attribute codes in the signed classification and correlation document and amendment(s).
Certain node/geometry and topology GT- polygon/chain relationships are collected or generated to satisfy topological requirements (the GT-polygon corresponds to the soil delineation). Some of these requirements include: chains must begin and end at nodes, chains must connect to each other at nodes, chains do not extend through nodes, left and right GT-polygons are defined for each chain element and are consistent throughout, and the chains representing the limits of the file are free of gaps. The tests of logical consistency are performed using vendor software. All internal polygons are tested for closure with vendor software and are checked on hard copy plots. All data are checked for common soil lines (i.e., adjacent polygons with the same label). Edge locations generally do not deviate from centerline to centerline by more than 0.01 inch. The extent of the soil survey boundary of Los Padres National Forest Area, California has been edge matched to San Luis Obispo County, Coastal Part; San Luis Obispo County, Paso Robles Area; San Luis Obispo County, Carrizo Plain Area; Northern Santa Barbara Area, Santa Barbara County, South Coastal Part; Antelope Valley Area; Angeles National Forest Area, and Ventura Area soil surveys. Feature labels do not match.
A map unit is a collection of areas defined and named in terms of their soil components or miscellaneous areas or both. Each map unit differs in some respect from all others in a survey area and each map unit has a symbol that uniquely identifies the map unit on a soil map. Each individual area, point, or line so identified on the map is a delineation. Soil Scientists identify small areas of soils or miscellaneous areas that have properties and behavior significantly different than the named soils in the surrounding a map unit. These minor components may be indicated as special features. If they have a minimal effect on use and management, or could not be precisely located, they many not be indicated on the map. A map unit has specified kinds of soils or miscellaneous areas (map unit components), each with a designated range in proportionate extent. Map units include one or more kinds of soil or miscellaneous area. Miscellaneous areas are areas that have little or no recognizable soil. Specific National Cooperative Soil Survey standards and procedures were used in the classification of soils, design and name of map units, and location of special soil features. These standards are outlined in Agricultural Handbook 18, Soil Survey Manual, 1993, USDA, NRCS; Agricultural Handbook 436, Soil Taxonomy, 1995, USDA, NRCS; and all Amendments; Keys to Soil Taxonomy, (current issue) USDA, NRCS; National Soil Survey Handbook, title 430-VI,(current issue) USDA, NRCS. The actual composition and interpretive purity of the map unit delineations were based on data collected by scientists during the course of preparing the soil maps. Adherence to National Cooperative Soil Survey standards and procedures is based on peer review, quality control, and quality assurance. Quality control is outlined in the memorandum of understanding for the soil survey area and in documents that reside with the Natural Resources Conservation Service state soil scientist. Four kinds of map units are used in soil surveys: consociations, complexes, associations, and undifferentiated groups. Consociations - Consociations are named for the dominant soil. In a consociation, delineated areas use a single name from the dominant component in the map unit. Dissimilar components are minor in extent. The soil component in a consociation may be identified at any taxonomic level. Soil series is the lowest taxonomic level. A consociation that is named as a miscellaneous area is dominantly that kind of area and minor components do not significantly affect the use the map unit. The total amount of dissimilar inclusions of other components in a map unit generally does not exceed about 15 percent if limiting and 25 percent if nonlimiting. A single component of a dissimilar limiting inclusion generally does not exceed 10 percent if very contrasting. Complexes and associations - Complexes and associations consist of two or more dissimilar components that occur in a regularly repeating pattern. The total amount of other dissimilar components is minor extent. The following arbitrary rule determines whether complex or association is used in the name. The major components of an association can be separated at the scale of mapping. In either case, because the major components are sufficiently different in morphology or behavior, the map unit cannot be called a consociation. In each delineation of a complex or an association, each major component is normally present though their proportions may vary appreciably from one delineation to another. The total amount of inclusions in a map unit that are dissimilar to any of the major components does not exceed 15 percent if limiting and 25 percent if nonlimiting. A single kind of dissimilar limiting inclusion usually does not exceed 10 percent. Undifferentiated groups - Undifferentiated groups consist of two or more components that are not consistently associated geographically and, therefore, do not always occur together in the same map delineation. These components are included in the same named map unit because their use and management are the same or very similar for common uses. Generally they are grouped together because some common feature, such as steepness, stoniness, or flooding, determines their use and management. If two or more additional map units would serve no useful purpose, they may be included in the same unit. Each delineation has at least one of the major components, and some may have all of them. The same principles regarding the proportion of minor components that apply to consociations also apply to undifferentiated groups. The same principles regarding proportion of inclusion apply to undifferentiated groups as to consociations. Minimum documentation consists of three complete soil profile descriptions that are collected for each soil added to the legend, one additional per 3,000 acres mapped; three 10 observation transects for each map unit, one additional 10 point transect per 3,000 acres. A defined standard or level of confidence in the interpretive purity of the map unit delineations is attained by adjusting the kind and intensity of field investigations. Field investigations and data collection are carried out in sufficient detail to name map units and to identify accurately and consistently areas of about 5 acres for NRCS map units added, and 40 acres for U.S. Forest Survice map units.
Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The accuracy of these digital data is based upon their compilation to base maps that meet National Map Accuracy Standards at a scale of 1 inch equals 1,000 feet. The difference in positional accuracy between the soil boundaries and special soil features locations in the field and their digitized map locations is unknown. The locational accuracy of soil delineations on the ground varies with the transition between map units. For example, on long gently sloping landscapes the transition occurs gradually over many feet. Where landscapes change abruptly from steep to level, the transition will be very narrow. Soil delineation boundaries and special soil features generally were digitized within 0.01 inch of their locations on the digitizing source. The digital map elements are edge matched between data sets. The data along each quadrangle edge are matched against the data for the adjacent quadrangle. Edge locations generally do not deviate from centerline to centerline by more than 0.01 inch.
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Data Integrity: Q1. Many features have blank values in the FARMLNDCL field. That also goes for many features within the IRRCAPCLAS field. Can these be populated? A1. Not all areas or soil types translate to a farmlndcl field value, these stay blank. The Irrcapclas cannot be populated by County as this data is created by a federal agency and they have not filled in these values. Q2. AREASYMBOL field either has blank values or "CA672" as its value. Can the rest of the field be populated, if it is even necessary in the feature class. A2. County may be able to fill these blank fields at a later date, although created by the federal gov. USDA we should be able to discern what these fields should've been. Q3. MUKEY field seems to correspond directly with IRRCAPCLAS field other then the many features that have blank values for MUKEY. Can they be populated or deleted? A3. County cannot populate the MUKEY field, not sure quite yet just what it is but may be important for a soil scientist.
Topology: Q1. Must Not Overlap = 465 errors were found. Almost all errors include the overlapping of the following polygons; ObjectID 2378, 2383, 2387, 2388, 2389, 2400, 2402, 2403, 2404 & 2407. Revisit them and fix overlapping. A1. Mark Bright & Brett Buyan state that errors should be ignored, or tolerances should be increased.
Metadata: Need additional entity attribute information.
430 G Street #4164