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The PCD (Point Cloud Data) is a file format for storing 3D point cloud data. It was created because existing formats did not support some of the features provided by the PCL library. PCD is the primary data format in PCL, but the library also offers the ability to save and load data in other formats (such as PLY, IFS, VTK, STL, OBJ, X3D).
A point cloud image of a torus Geo-referenced point cloud of Red Rocks, Colorado (by DroneMapper) A point cloud is a discrete set of data points in space. The points may represent a 3D shape or object. Each point position has its set of Cartesian coordinates (X, Y, Z).
Describes format, number of points, extent of the point cloud and other generic data. Variable length records (VLR) Any number of optional records to provide various data such as the spatial reference system used, metadata, waveform packet information and user application data. [1] [4] Each VLR can hold a data payload of up to 65,535 bytes in ...
CloudCompare an open source point and model processing tool that includes an implementation of the ICP algorithm. Released under the GNU General Public License. PCL (Point Cloud Library) is an open-source framework for n-dimensional point clouds and 3D geometry processing. It includes several variants of the ICP algorithm.
Go: the standard library package math/big implements arbitrary-precision integers (Int type), rational numbers (Rat type), and floating-point numbers (Float type) Guile: the built-in exact numbers are of arbitrary precision. Example: (expt 10 100) produces the expected (large) result. Exact numbers also include rationals, so (/ 3 4) produces 3/4.
The point quadtree [3] is an adaptation of a binary tree used to represent two-dimensional point data. It shares the features of all quadtrees but is a true tree as the center of a subdivision is always on a point. It is often very efficient in comparing two-dimensional, ordered data points, usually operating in O(log n) time.
Traf-O-Data was a business partnership between Bill Gates, Paul Allen and Paul Gilbert back in the 1970s. It was designed to read the raw data from roadway traffic counters and produce reports for ...
While the current dBase standard, and GDAL/OGR (the main open source software library for reading and writing shapefile format datasets) support null values, ESRI software represents these values as zeros — a very serious issue for analyzing quantitative data, as it may skew representation and statistics if null quantities are represented as zero