<?xml version="1.0" encoding="CP1252"?>
<!DOCTYPE task SYSTEM "grass-interface.dtd">
<task name="r.cva">
	<description>
		Multiple/cumulative viewshed analysis
	</description>
	<parameter name="input" type="string" required="yes" multiple="no">
		<description>
			Elevation raster map
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="old" element="cell" prompt="raster" />
	</parameter>
	<parameter name="target_mask" type="string" required="no" multiple="no">
		<description>
			Binary raster map for target cells
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="old" element="cell" prompt="raster" />
	</parameter>
	<parameter name="viewpt_mask" type="string" required="no" multiple="no">
		<description>
			Binary raster map for viewpoints
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="old" element="cell" prompt="raster" />
	</parameter>
	<parameter name="sites" type="string" required="no" multiple="no">
		<description>
			Vector map with sites points
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="old" element="vector" prompt="vector" />
	</parameter>
	<parameter name="layer" type="integer" required="no" multiple="no">
		<label>
			Número de capa.
		</label>
		<description>
			Es posible conectar un solo mapa vectorial con múltiples tablas de una base de datos. Este número determina qué tabla se ha de usar.
		</description>
		<gisprompt age="old_layer" element="layer" prompt="layer" />
		<default>
			1
		</default>
	</parameter>
	<parameter name="output" type="string" required="yes" multiple="no">
		<description>
			Raster map name for storing results
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="new" element="cell" prompt="raster" />
	</parameter>
	<parameter name="obs_elev" type="float" required="no" multiple="no">
		<description>
			Height of the viewing location
		</description>
		<default>
			1.75
		</default>
	</parameter>
	<parameter name="target_elev" type="float" required="no" multiple="no">
		<description>
			Height of the target location
		</description>
		<default>
			0.0
		</default>
	</parameter>
	<parameter name="max_dist" type="float" required="no" multiple="no">
		<description>
			Max viewing distance in meters
		</description>
		<default>
			2000
		</default>
		<values>
			<value>
				<name>0.0-9999999.9</name>
			</value>
		</values>
	</parameter>
	<parameter name="seed" type="integer" required="no" multiple="no">
		<description>
			Seed for the random number generator
		</description>
		<default>
			1
		</default>
		<values>
			<value>
				<name>0-32767</name>
			</value>
		</values>
	</parameter>
	<parameter name="sample" type="float" required="no" multiple="no">
		<description>
			Sampling frequency as a percentage of cells
		</description>
		<default>
			10.0
		</default>
	</parameter>
	<parameter name="type" type="string" required="yes" multiple="no">
		<description>
			Type of viewshed analysis
		</description>
		<default>
			sites
		</default>
		<values>
			<value>
				<name>sites</name>
			</value>
			<value>
				<name>systematic</name>
			</value>
			<value>
				<name>random</name>
			</value>
			<value>
				<name>all</name>
			</value>
		</values>
	</parameter>
	<parameter name="spot" type="float" required="no" multiple="no">
		<description>
			Absolute observer height
		</description>
	</parameter>
	<parameter name="offseta" type="float" required="no" multiple="no">
		<description>
			Observer offset (OFFSETA=obs_elev)
		</description>
	</parameter>
	<parameter name="offsetb" type="float" required="no" multiple="no">
		<description>
			target offset (OFFSETB=target_elev)
		</description>
	</parameter>
	<parameter name="azimuth1" type="float" required="no" multiple="no">
		<description>
			Minimum azimuth (AZIMUTH1)
		</description>
		<values>
			<value>
				<name>0.0-360.0</name>
			</value>
		</values>
	</parameter>
	<parameter name="azimuth2" type="float" required="no" multiple="no">
		<description>
			Maximum azimuth (AZIMUTH2)
		</description>
		<values>
			<value>
				<name>0.0-360.0</name>
			</value>
		</values>
	</parameter>
	<parameter name="vert1" type="float" required="no" multiple="no">
		<description>
			Minimum vertical angle (VERT1)
		</description>
		<values>
			<value>
				<name>0.0-90.0</name>
			</value>
		</values>
	</parameter>
	<parameter name="vert2" type="float" required="no" multiple="no">
		<description>
			Maximum vertical angle (VERT2)
		</description>
		<values>
			<value>
				<name>-90.0-0.0</name>
			</value>
		</values>
	</parameter>
	<parameter name="radius1" type="float" required="no" multiple="no">
		<description>
			Minimum distance from observer (RADIUS1)
		</description>
	</parameter>
	<parameter name="radius2" type="float" required="no" multiple="no">
		<description>
			Maximum distance to observer (RADIUS2)
		</description>
	</parameter>
	<parameter name="curvc" type="float" required="no" multiple="no">
		<description>
			Earth curvature correction threshold (0.0 = off)
		</description>
		<default>
			0.0
		</default>
	</parameter>
	<flag name="f">
		<description>
			Calculate the `visibility from' rather than `viewsheds of' 
		</description>
	</flag>
	<flag name="m">
		<description>
			Differentiate masked cells from data value zero 
		</description>
	</flag>
	<flag name="a">
		<description>
			Treat sample size as no. of cells 
		</description>
	</flag>
	<flag name="q">
		<description>
			Run quietly (i.e. do not report % complete) 
		</description>
	</flag>
	<flag name="r">
		<description>
			Allow replacement during random sampling 
		</description>
	</flag>
	<flag name="h">
		<description>
			Adjust spot heights below surface
		</description>
	</flag>
	<flag name="i">
		<description>
			Ignore site attributes
		</description>
	</flag>
	<flag name="n">
		<description>
			Convert -1 to NULL in output map 
		</description>
	</flag>
	<flag name="s">
		<description>
			Run silently 
		</description>
	</flag>
	<flag name="overwrite">
		<description>
			Permite a los archivos de salida sobrescribir los archivos existentes.
		</description>
	</flag>
	<flag name="verbose">
		<description>
			Salida detallada del módulo.
		</description>
	</flag>
	<flag name="quiet">
		<description>
			Salida del módulo "silenciosa".
		</description>
	</flag>
</task>
