v3_LCC NLCD LAND - USEPA/ATtILA2 GitHub Wiki

NLCD LAND

National Land Cover Database LAND

Water-related raster values are tagged as EXCLUDED. Excluded values are ignored when calculating the effective area of a reporting unit. Percentage metrics are based on the effective area of a reporting unit, not the total area.

Coefficient values for impervious area calculations are based on those reported in Caraco et al. (1998). Those supplied for the nitrogen loading and phosphorous loading estimates were obtained from Reckhow et al. (1980). As coefficient values can vary considerably for a given land cover type across locations, all provided values should be evaluated critically before use and altered when necessary.

For more information about the National Land Cover Dataset go to: http://www.mrlc.gov

NLCD LAND - Value Table

Value Description Excluded Nitrogen Phosphorus Impervious Class(es)
11 Open Water yes
12 Perennial Ice/Snow yes
21 Open Space Developed 0.1 UI, dev, devo
22 Low Intensity Developed 5.5 1.2 0.4 UI, dev, devl
23 Medium Intensity Developed 5.5 1.2 0.6 UI, dev, devm
24 High Intensity Developed 5.5 1.2 0.9 UI, dev, devh
31 Barren Land (Rock/Sand/Clay) NI, bar
41 Deciduous Forest 2.5 0.25 0.02 NI, for
42 Evergreen Forest 2.5 0.25 0.02 NI, for
43 Mixed Forest 2.5 0.25 0.02 NI, for
51 Dwarf Scrub 0.4 0.04 0.02 NI, tun
52 Scrub/Shrub 0.4 0.04 0.02 NI, shb
71 Grassland 0.3 0.06 0.02 NI, hrb
72 Sedge/Herbaceous 0.3 0.06 0.02 NI, tun
73 Lichen 0.3 0.06 0.02 NI, tun
74 Moss 0.3 0.06 0.02 NI, tun
81 Pasture/Hay 5.0 0.9 UI, agr, agrp
82 Cultivated Crop 5.0 0.9 UI, agr, agrc
90 Woody Wetland 0.02 NI, wtl, wtlw
95 Emergent Herbaceous Wetland 0.02 NI, wtl, wtle

NLCD LAND - Class Table

Class Name abbv Value
All Natural Land Use NI 31,41,42,43,51,52,71,72,73,74,90,95
Barren bar 31
Forest for 41,42,43
Tundra tun 51,72,73,74
Shrubland shb 52
Herbaceous hrb 71
Wetland wtl 90,95
Woody Wetland wtlw 90
Emergent Wetland wtle 95
All Human Land Use UI 21,22,23,24,81,82
Developed dev 21,22,23,24
Open Space Developed devo 21
Low Intensity Developed devl 22
Medium Intensity Developed devm 23
High Intensity Developed devh 24
Agriculture agr 81,82
Pasture/Hay agrp 81
Cultivated Crop agrc 82
View NLCD LAND XML

NLCD LAND XML

<?xml version='1.0' encoding='UTF-8'?>
<lccSchema xmlns="lcc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="lcc LCCSchema.xsd">
    <metadata>
        <name>NLCD LAND</name>
        <description>National Land Cover Database LAND Land Cover Classification Schema. Viable for the NLCD datasets produced in 2001 or later. Water-related raster values are tagged as EXCLUDED. Excluded values are ignored when calculating the effective area of a reporting unit. Percentage metrics are based on the effective area of a reporting unit, not the total area. Coefficient values for impervious area calculations are based on those reported in Caraco et al. (1998). Those supplied for the nitrogen loading and phosphorous loading estimates were obtained from Reckhow et al. (1980). As coefficient values can vary considerably for a given land cover type across locations, all provided values should be evaluated critically before use and altered when necessary. Complete literature citations are provided in the ATtILA online help (https://github.com/USEPA/ATtILA2/wiki).</description>
    </metadata>
    <!--  
        * The coefficients node contains coefficients to be assigned to values.
           
        * REQUIRED ATTRIBUTES
        * Id - text, unique identifier
        * Name - text, word or phrase describing coefficient
        * fieldName - text, name of field to be created for output
        *           - must conform to the field naming conventions dictated by the output database system
        * method - text, "P" or "A", designates "P"ercentage or per unit "A"rea calculation routine
     -->
    <coefficients>
        <coefficient Id="IMPERVIOUS" Name="Percent Cover Total Impervious Area" fieldName="PCTIA" method="P" />
        <coefficient Id="NITROGEN" Name="Estimated Nitrogen Loading Based on Land Cover" fieldName="N_Load" method="A" />
        <coefficient Id="PHOSPHORUS" Name="Estimated Phosphorus Loading Based on Land Cover" fieldName="P_Load" method="A" />
    </coefficients>
    <!--  
        * The values node defines the full set of values that can exist in a land cover raster.
        
        * REQUIRED ATTRIBUTES
        * Id - integer, raster code
        *
        * OPTIONAL ATTRIBUTES
        * Name - text, word or phrase describing value
        * excluded - boolean, "true" or "false" or "1" or "0"
        *          - used to exclude values from effective area calculations
        *          - excluded=false is the default 
        
        * A value element can optionally contain one or more coefficient elements

        * REQUIRED COEFFICIENT ATTRIBUTES
        * Id - text, must match an Id attribute from a coefficients node element
        * value - decimal, weighting/calculation factor
     -->
    <values>
        <value Id="0" Name="Unclassified" excluded="true">
            <coefficient Id="IMPERVIOUS" value="0.0" />
            <coefficient Id="NITROGEN" value="0.0" />
            <coefficient Id="PHOSPHORUS" value="0.0" />
        </value>
        <value Id="11" Name="Open Water" excluded="true">
            <coefficient Id="IMPERVIOUS" value="0.0" />
            <coefficient Id="NITROGEN" value="0.0" />
            <coefficient Id="PHOSPHORUS" value="0.0" />
        </value>
        <value Id="12" Name="Perennial Ice/Snow" excluded="true">
            <coefficient Id="IMPERVIOUS" value="0.0" />
            <coefficient Id="NITROGEN" value="0.0" />
            <coefficient Id="PHOSPHORUS" value="0.0" />
        </value>
        <value Id="21" Name="Open Space Developed">
            <coefficient Id="IMPERVIOUS" value="0.1" />
            <coefficient Id="NITROGEN" value="0.0" />
            <coefficient Id="PHOSPHORUS" value="0.0" />
        </value>
        <value Id="22" Name="Low Intensity Developed">
            <coefficient Id="IMPERVIOUS" value="0.4" />
            <coefficient Id="NITROGEN" value="5.5" />
            <coefficient Id="PHOSPHORUS" value="1.2" />
        </value>
        <value Id="23" Name="Medium Intensity Developed">
            <coefficient Id="IMPERVIOUS" value="0.6" />
            <coefficient Id="NITROGEN" value="5.5" />
            <coefficient Id="PHOSPHORUS" value="1.2" />
        </value>
        <value Id="24" Name="High Intensity Developed">
            <coefficient Id="IMPERVIOUS" value="0.9" />
            <coefficient Id="NITROGEN" value="5.5" />
            <coefficient Id="PHOSPHORUS" value="1.2" />
        </value>
        <value Id="31" Name="Barren Land (Rock/Sand/Clay)">
            <coefficient Id="IMPERVIOUS" value="0.0" />
            <coefficient Id="NITROGEN" value="0.0" />
            <coefficient Id="PHOSPHORUS" value="0.0" />
        </value>
        <value Id="41" Name="Deciduous Forest">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="2.5" />
            <coefficient Id="PHOSPHORUS" value="0.25" />
        </value>
        <value Id="42" Name="Evergreen Forest">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="2.5" />
            <coefficient Id="PHOSPHORUS" value="0.25" />
        </value>
        <value Id="43" Name="Mixed Forest">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="2.5" />
            <coefficient Id="PHOSPHORUS" value="0.25" />
        </value>
        <value Id="51" Name="Dwarf Scrub">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.4" />
            <coefficient Id="PHOSPHORUS" value="0.04" />
        </value>
        <value Id="52" Name="Scrub/Shrub">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.4" />
            <coefficient Id="PHOSPHORUS" value="0.04" />
        </value>
        <value Id="71" Name="Grassland">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.3" />
            <coefficient Id="PHOSPHORUS" value="0.06" />
        </value>
        <value Id="72" Name="Sedge/Herbaceous">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.3" />
            <coefficient Id="PHOSPHORUS" value="0.06" />
        </value>
        <value Id="73" Name="Lichen">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.3" />
            <coefficient Id="PHOSPHORUS" value="0.06" />
        </value>
        <value Id="74" Name="Moss">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.3" />
            <coefficient Id="PHOSPHORUS" value="0.06" />
        </value>
        <value Id="81" Name="Pasture/Hay">
            <coefficient Id="IMPERVIOUS" value="0.0" />
            <coefficient Id="NITROGEN" value="5.0" />
            <coefficient Id="PHOSPHORUS" value="0.9" />
        </value>
        <value Id="82" Name="Cultivated Crop">
            <coefficient Id="IMPERVIOUS" value="0.0" />
            <coefficient Id="NITROGEN" value="5.0" />
            <coefficient Id="PHOSPHORUS" value="0.9" />
        </value>
        <value Id="90" Name="Woody Wetland">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.0" />
            <coefficient Id="PHOSPHORUS" value="0.0" />
        </value>
        <value Id="95" Name="Emergent Herbaceous Wetland">
            <coefficient Id="IMPERVIOUS" value="0.02" />
            <coefficient Id="NITROGEN" value="0.0" />
            <coefficient Id="PHOSPHORUS" value="0.0" />
        </value>
    </values>
    <!-- 
        * The classes node contains values from a land cover raster grouped into one or more classes.
    
        * REQUIRED ATTRIBUTES
        * Id - text, unique identifier, also used for automated generation of output field name
        *    - must conform to the field naming conventions dictated by the output database system
        
        * OPTIONAL ATTRIBUTES
        * Name - text, word or phrase describing class
        * filter - text, a string of one or more tool name abbreviations separated by a ";"
        *        - possible abbreviations are: caem, flcp, flcv, lcosp, lcp, np, plcv, pm, rlcp, and splcp
        *        - used to exclude the class from the selectable classes in the tool's GUI
        * xxxxField - text, overrides ATtILA-generated field name for output
        *           - where xxxx equals a tool name abbreviation
        *           - possible abbreviations are: caem, flcp, flcv, lcosp, lcp, rlcp, and splcp
        *           - a separate xxxxField attribute can exist for each tool
        *           - must conform to the field naming conventions dictated by the output database system

        * A class can contain either values or classes but not both types.
        * Value elements contain only an Id attribute which refers to a value in a raster.
        * Values tagged as excluded="true" in the values node should not be included in any class.
     -->
    <classes>
        <class Id="NI" Name="All Natural Land Use" filter="" lcpField="NINDEX">
            <class Id="bar" Name="Barren" filter="">
                <value Id="31" />
            </class>
            <class Id="for" Name="Forest" filter="">
                <value Id="41" />
                <value Id="42" />
                <value Id="43" />
            </class>
            <class Id="tun" Name="Tundra" filter="">
                <value Id="51" />
                <value Id="72" />
                <value Id="73" />
                <value Id="74" />
            </class>
            <class Id="shb" Name="Shrubland" filter="">
                <value Id="52" />
            </class>
            <class Id="hrb" Name="Herbaceous" filter="">
                <value Id="71" />
            </class>
            <class Id="wtl" Name="Wetland" filter="">
                <class Id="wtlw" Name="Woody Wetland" filter="">
                    <value Id="90" />
                </class>
                <class Id="wtle" Name="Emergent Wetland" filter="">
                    <value Id="95" />
                </class>
            </class>
        </class>
        <class Id="UI" Name="All Human Land Use" filter="" lcpField="UINDEX">
            <class Id="dev" Name="Developed" filter="">
                <class Id="devo" Name="Open Space Developed" filter="">
                    <value Id="21" />
                </class>
                <class Id="devl" Name="Low Intensity Developed" filter="">
                    <value Id="22" />
                </class>
                <class Id="devm" Name="Medium Intensity Developed" filter="">
                    <value Id="23" />
                </class>
                <class Id="devh" Name="High Intensity Devloped" filter="">
                    <value Id="24" />
                </class>
            </class>
            <class Id="agr" Name="Agriculture" filter="">
                <class Id="agrp" Name="Pasture/Hay" filter="">
                    <value Id="81" />
                </class>
                <class Id="agrc" Name="Cultivated Crop" filter="">
                    <value Id="82" />
                </class>
            </class>
        </class>
    </classes>
</lccSchema>

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