Laserfiche WebLink
( ) ( <br />percentage of the mapping unit identifier) and sums the results from all the <br />comppct muid <br />( ). <br />within the individual mapping units <br />sequa muid <br /> t <br />12.Generate a file from ARC/INFO called hat contains detailed information <br />soil_layer_awc <br />. <br />regarding the depth of each of the layers for a given A separate file is also generated <br />seqnum <br />, , <br />showing the and percent of the the represents. These two <br />muid seqnum muid seqnum <br />files are then used by a program called to create a file containing the total AWC <br />layerawc.f <br />. <br />for each The program uses the total AWC for each along <br />seqnum layerawc.f seqnum <br />with the percent that each represents of a to calculate the weighted AWC (ft/ft) <br />seqnum muid <br />for each unit. The program writes this information to a file called <br />muid layerawc.f <br />. <br />A sample of this file is shown below: <br />muid_awc.out <br />$RECNO MUID AWCT <br /> 29 CO001 0.101 <br /> 45 CO002 0.099 <br /> 65 CO003 0.049 <br /> 83 CO004 0.127 <br /> 103 CO005 0.135 <br /> 122 CO006 0.133 <br /> 150 CO007 0.091 <br /> 176 CO008 0.125 <br /> 203 CO009 0.099 <br /> 221 CO010 0.080 <br /> 244 CO011 0.087 <br />Surface Texture <br />Calculation of surface texture was based on the SCS Colorado STATSGO database in an approach <br />generally similar to that used for AWC as described above. <br />The ARC/INFO coverage was used to identify the location of the mapping <br />/crdss_arc/scs/soil <br />units (the identifier in the polygon attribute table). This coverage and the necessary database files <br />muid <br />. <br />(texture and comp) were copied to the workspace The database file <br />/crdss_arc/scs/awc <br />describes the average percentages of sand, silt, and clay for each textural class as a <br />texture.lut <br />look-up table. The database file comp describes the sequa ( identifier) that comprise the <br />Seqnum <br />mapping units ( identifier). The following is the process by which a surface texture for each <br />muid <br />mapping unit was calculated using ARC/INFO: <br />1.Add the following items to the file comp: <br />sandformatted as 3 3 I <br />silt3 3 I <br />clay3 3 I <br />texttot3 3 N 3 <br />. <br />2.Relate comp to by the item Calculate sand, silt, and clay in comp <br />texture.lut surftext <br />. <br />to be equal to sand, silt, and clay (* 100) in <br />texture.lut <br />: <br />3.Add the following items to the file <br />soilw.pat <br />3 <br />A275 01.09.95 1.14-17 CSU IDS <br />