Tool Point Cloud Attribute Calculator
The Point Cloud Attribute Calculator calculates a new attribute based on existing attributes and a mathematical formula. Attribute fields are addressed by the character 'f' (for 'field') followed by the field number (i.e.: f1, f2, ..., fn) or by the field name in square brackets (e.g.: [Field Name]).
Examples:
sin(f1) * f2 + f3
[intensity] / 1000
The following operators are available for the formula definition:
| + | Addition |
| - | Subtraction |
| * | Multiplication |
| / | Division |
| abs(x) | Absolute Value |
| mod(x, y) | Returns the floating point remainder of x/y |
| int(x) | Returns the integer part of floating point value x |
| sqr(x) | Square |
| sqrt(x) | Square Root |
| exp(x) | Exponential |
| pow(x, y) | Returns x raised to the power of y |
| x ^ y | Returns x raised to the power of y |
| ln(x) | Natural Logarithm |
| log(x) | Base 10 Logarithm |
| pi() | Returns the value of Pi |
| sin(x) | Sine |
| cos(x) | Cosine |
| tan(x) | Tangent |
| asin(x) | Arcsine |
| acos(x) | Arccosine |
| atan(x) | Arctangent |
| atan2(x, y) | Arctangent of x/y |
| min(x, y) | Returns the minimum of values x and y |
| max(x, y) | Returns the maximum of values x and y |
| gt(x, y) | Returns true (1), if x is greater than y, else false (0) |
| x > y | Returns true (1), if x is greater than y, else false (0) |
| lt(x, y) | Returns true (1), if x is less than y, else false (0) |
| x < y | Returns true (1), if x is less than y, else false (0) |
| eq(x, y) | Returns true (1), if x equals y, else false (0) |
| x = y | Returns true (1), if x equals y, else false (0) |
| and(x, y) | Returns true (1), if both x and y are true (i.e. not 0) |
| or(x, y) | Returns true (1), if at least one of both x and y is true (i.e. not 0) |
| ifelse(c, x, y) | Returns x, if condition c is true (i.e. not 0), else y |
| rand_u(x, y) | Random number, uniform distribution with minimum x and maximum y |
| rand_g(x, y) | Random number, Gaussian distribution with mean x and standard deviation y |
- Author: Volker Wichmann (c) 2010-213, LASERDATA GmbH
- Menu: Shapes|Point Clouds|Tools
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Point Cloud | Point Cloud (input) | PC_IN | Input | - |
| Output | Result (*) | Point Cloud (optional output) | PC_OUT | Output | - |
| Options | Formula | Text | FORMULA | - | Default: f1+f2 |
| Output Field Name | Text | NAME | - | Default: Calculation | |
| Field data type | Choice | TYPE | - | Available Choices: [0] 1 bit [1] 1 byte unsigned integer [2] 1 byte signed integer [3] 2 byte unsigned integer [4] 2 byte signed integer [5] 4 byte unsigned integer [6] 4 byte signed integer [7] 4 byte floating point [8] 8 byte floating point Default: 7 | |
| Use NoData | Boolean | USE_NODATA | Check this in order to include NoData points in the calculation. | Default: 0 | |
| (*) optional | |||||
Command-line
Usage: saga_cmd pointcloud_tools 10 [-PC_IN <str>] [-PC_OUT <str>] [-FORMULA <str>] [-NAME <str>] [-TYPE <str>] [-USE_NODATA <str>] -PC_IN:<str> Point Cloud Point Cloud (input) -PC_OUT:<str> Result Point Cloud (optional output) -FORMULA:<str> Formula Text Default: f1+f2 -NAME:<str> Output Field Name Text Default: Calculation -TYPE:<str> Field data type Choice Available Choices: [0] 1 bit [1] 1 byte unsigned integer [2] 1 byte signed integer [3] 2 byte unsigned integer [4] 2 byte signed integer [5] 4 byte unsigned integer [6] 4 byte signed integer [7] 4 byte floating point [8] 8 byte floating point Default: 7 -USE_NODATA:<str> Use NoData Boolean Default: 0