# Point Cloud Reclassifier / Subset Extractor

Volker Wichmann (c) 2009, LASERDATA GmbH
The module can be used to either reclassify a Point Cloud attribute or to extract a subset of a Point Cloud based on the values of an attribute.
The module provides three different options:
(a) reclassification of (or extraction based on) single values,
(b) reclassification of (or extraction based on) a range of values and
(c) reclassification of (or extraction based on) value ranges specified in a lookup table.
Each of these three options provides it's own parameters. The 'new value' parameters are irrelevant in case a subset is extracted.
In addition to these settings, two special cases ('NoData values' and 'other values' not included in the parameter setup) are supported:
In mode (a) and (b) the 'NoData option' is evaluated before the method settings, in mode (c) the option is evaluated only if the NoData value ins't included in the lookup table.
The 'other values' option is always evaluated after checking the method settings.

## Parameters

Point Cloud
Input Point Cloud
  Point Cloud to reclassify/extract
Attribute
Table field
  Attribute to process.
Result
Output Point Cloud
  Reclassified or extracted Point Cloud.
Mode of operation
Choice
  Choose whether to reclassify a Point Cloud or to extract a subset from a Point Cloud.
  Available choices: Reclassify, Extract Subset
Method
Choice
  Select the desired method: 1. a single value or a range defined by a single value is reclassified, 2. a range of values is reclassified, 3. the lookup table is used to reclassify the grid.
  Available choices: single, range, simple table, user supplied table
old value
Floating point
  Value to reclassify.
new value
Floating point
  New value.
operator
Choice
  Select the desired operator (<;.;=; >;.); it is possible to define a range above or below the old value.
  Available choices: =, <, <=, >=, >
minimum value
Floating point
  Minimum value of the range to be reclassified.
maximum value
Floating point
  Maximum value of the range to be reclassified.
new value
Floating point
  new value
operator
Choice
  Select operator: eg. min < value < max.
  Available choices: <=, <
Lookup Table
Static table
  Lookup table used in method "table"
operator
Choice
  Select the desired operator (min < value < max; min . value < max; min .value . max; min < value . max).
  Available choices: min <= value < max, min <= value <= max, min < value <= max, min < value < max
Lookup Table
Input Table
  Lookup table used in method "user supplied table"
minimum value
Table field
maximum value
Table field
new value
Table field
Special cases
Node
  Parameter settings for No-Data and all other values.
no data values
Boolean
  Use this option to reclassify No-Data values independently of the method settings.
new value
Floating point
  new value
other values
Boolean
  Use this option to reclassify all other values that are not specified in the options above.
new value
Floating point
  new value