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.. _readers.ept: | ||
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readers.ept | ||
=========== | ||
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`Entwine Point Tile`_ (EPT) is a hierarchical octree-based point cloud format suitable for real-time rendering and lossless archival. `Entwine`_ is a producer of this format. The **EPT Reader** supports reading data from the EPT format, including spatially accelerated queries and file reconstruction queries. | ||
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Sample EPT datasets of hundreds of billions of points in size may be viewed at http://potree.entwine.io and http://speck.ly. | ||
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.. embed:: | ||
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Example | ||
-------------------------------------------------------------------------------- | ||
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This example downloads a small area around the the Statue of Liberty from the New York City data set (4.7 billion points) which can be viewed in its entirety in `Potree`_ or `Plasio`_. | ||
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.. code-block:: json | ||
{ | ||
"pipeline": [ | ||
{ | ||
"type": "readers.ept", | ||
"filename": "http://na.entwine.io/nyc", | ||
"bounds": "([-8242669, -8242529], [4966549, 4966674])" | ||
}, | ||
"statue-of-liberty.las" | ||
] | ||
} | ||
Options | ||
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filename | ||
EPT resource from which to read. Because EPT resources do not have a file extension, to specify an EPT resource as a string, it must be prefixed with ``ept://``. For example, ``pdal translate ept://http://na.entwine.io/autzen autzen.laz``. [Required] | ||
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bounds | ||
The extents of the resource to select in 2 or 3 dimensions, expressed as a string, e.g.: ``([xmin, xmax], [ymin, ymax], [zmin, zmax])``. If omitted, the entire dataset will be selected. | ||
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origin | ||
EPT datasets are lossless aggregations of potentially multiple source files. The *origin* options can be used to select all points from a single source file. This option may be specified as a string or an integral ID. | ||
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The string form of this option selects a source file by its original file path. This may be a substring instead of the entire path, but the string must uniquely select only one source file (via substring search). For example, for an EPT dataset created from source files *one.las*, *two.las*, and *two.bpf*, `"one"` is a sufficient selector, but `"two"` is not. | ||
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The integral form of this option selects a source file by its ``OriginId`` dimension, which can be found via the files position in EPT metadata file ``entwine-files.json``. | ||
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threads | ||
Number of worker threads used to download and process EPT data. A minimum of 4 will be used no matter what value is specified. | ||
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.. _Entwine Point Tile: https://github.com/connormanning/entwine/blob/master/doc/entwine-point-tile.md | ||
.. _Entwine: https://entwine.io/ | ||
.. _Potree: http://potree.entwine.io/data/nyc.html | ||
.. _Plasio: http://speck.ly/?s=http%3A%2F%2Fc%5B0-7%5D.greyhound.io&r=ept%3A%2F%2Fna.entwine.io%2Fnyc&ca=-0&ce=49.06&ct=-8239196%2C4958509.308%2C337&cd=42640.943&cmd=125978.13&ps=2&pa=0.1&ze=1&c0s=remote%3A%2F%2Fimagery%3Furl%3Dhttp%3A%2F%2Fserver.arcgisonline.com%2FArcGIS%2Frest%2Fservices%2FWorld_Imagery%2FMapServer%2Ftile%2F%7B%7Bz%7D%7D%2F%7B%7By%7D%7D%2F%7B%7Bx%7D%7D.jpg | ||
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