{ "currentVersion": 10.81, "cimVersion": "2.6.0", "serviceDescription": "This service displays the Bulk Density Whole Soil theme from the GSM v0.1 based on U.S. General Soil Map (STATSGO2). The Bulk Density Whole Soil theme is displayed by three property values; high, low, and representative. Each value displays the depth range in cm. ", "mapName": "Layers1", "description": "The \"bdws\" tables refer to the whole soil bulk density. This measurement is conducted on intact or minimally intact soil samples extracted\nin the field and preserved for later dterminations under laboratory conditions. Soils that maintain their physical integrity during excavation\nare coated (clod method) and submerged for volume determinations or extracted using a cylinder of known volume.The whole-soil bulk density may be overestimated because sampled clods frequently exclude the crack space between clods. For more informaion on the whole soil bulk density please \nrefer to Soil Survey Laboratory Methods Manual (Soil Survey Staff. 2014. Kellogg Soil Survey Laboratory Methods Manual. Soil Survey Investigations \nReport No. 42, Version 5.0. R. Burt and Soil Survey Staff (ed.). U.S. Department of Agriculture, Natural Resources\nConservation Service and Soil Survey Laboratory Information Manual (Soil Survey Staff. 2011. Soil Survey Laboratory Information Manual. Soil\nSurvey Investigations Report No. 45, Version 2.0. R. Burt (ed.). U.S. Department of Agriculture, Natural Resources Conservation Service. \n\nThe \"bdws_h\", \"bdws_l\" and \"bdws_r\" tables are designed to facilitate thematic mapping. The tables are national in extent and can be \nused in conjunction with the GSM Version 0.1 grid to map whole soil bulk density (bdws). The \"h\", \"l\", and \"r\" correspond to \n\"high\", \"low\" and \"representative\" property values. \nThe \"l\" represents the minimum low value of all the components within each map unit and is used as an approximate lower \nconfidence limit estimate for the map unit at each depth. For the lower estimate above the representative value \"r\" (due to\nincomplete population of high and low values in STATSGO2, and anomalies in the spline), the lower\nestimate was set to null.\nThe \"h\" represents the maximum value of all the components within each map unit and is used as an approximate upper \nconfidence limit estimate for the map unit at each depth. For the upper estimate above the representative value \"r\" (due to\nincomplete population of high and low values in STATSGO2, and anomalies in the spline), the upper\nestimate was set to null. \nThe tables can be attached to the raster map layer data using the common \"mukey\" for spatial mapping. This table represents bulk density (whole soil) soil property. Each table contains 50 columns.\n
Field<\/th>Description<\/th><\/tr>\n
mukey: <\/td>Map unit identification key<\/td><\/tr>
tot_comps: <\/td>Total number of components within the map unit<\/td><\/tr>
bdws_r0to5: <\/td>Value for representative bdws in the 0-5 cm depth interval<\/td><\/tr>
cntrb_bdws_r0to5: <\/td>Percent (by area) of map unit used for weighted average calculation for 0-5 cm interval<\/td><\/tr>
null_pct_bdws_r_0to5: <\/td>Percent (by area) of map unit that has missing data for 0-5 cm interval<\/td><\/tr>
misc_pct_bdws_r_0to5: <\/td>Percent (by area) of map unit that is nonsoil material (miscellaneous) for 0-5 cm interval<\/td><\/tr>
avail_bdws_r0to5: <\/td>Number of map unit components that are soil and not null for 0-5 cm interval<\/td><\/tr>
missing_bdws_r0to5: <\/td>Number of map unit components that are nonsoil material or null for 0-5 cm interval<\/td><\/tr>
datatype_bdws_r0to5: <\/td>The type of calculation used to find the value for the map unit (either WM, SC, or OA)<\/td><\/tr>
bdws units: <\/td>gr per cm3 or equivalent to MG per m3 (GlobalSoilMap specifications)<\/td><\/tr><\/table>Columns \"mukey\" and \"tot_comps\" are unique. The remaining columns are repeated for each depth:\n5to15, 15to30, 30to60, 60to100, 100to200. \nThe \"datatype\" column is populated with three options:\n