pull/17/head
Stephen Mather 2019-09-11 22:42:43 -04:00
rodzic 717128a6a6
commit 5631e22c13
8 zmienionych plików z 19 dodań i 7 usunięć

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Flying tips
===========
The Humanitarian OpenStreetMap team has guidelines on `flying for UAV mapping <https://uav-guidelines.openaerialmap.org/>`_:
The `Humanitarian OpenStreetMap team <https://www.hotosm.org/>`_ has guidelines on `flying for UAV mapping <https://uav-guidelines.openaerialmap.org/>`_:
- `Choosing the right UAV <https://uav-guidelines.openaerialmap.org/pages/05-choosing-the-right-uav/>`_
@ -9,7 +9,7 @@ The Humanitarian OpenStreetMap team has guidelines on `flying for UAV mapping <h
- `Mission preparation <https://uav-guidelines.openaerialmap.org/pages/07-preparing-for-the-uav-mission/>`_
The guidelines are intended for mapping projects on islands, but have general use for all drone mappers.
The guidelines are intended for drone mapping projects on islands, but have general use for all drone mappers.
See also DroneDeploy's guide on `Making Successful Maps <https://support.dronedeploy.com/docs/making-successful-maps>`_, which provides great tips on mission planning.

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Calibrate images
----------------
Image calibration is recommended (but not required) for large datasets because error propagation due to image distortion could cause a bowl effect on the models. Calibration instructions can be found at `Calibrate Images <using.html#calibrating-the-camera>`_.
Image calibration is recommended (but not required) for large datasets because error propagation due to image distortion could cause a bowl effect on the models. Calibration instructions can be found at `Calibrate Images <using.html#calibrating-the-camera>`_.
.. figure:: images/msimbasi_bowling.png
:alt: image of lens distortion effect on bowling of data
:align: center
Bowling effect on point cloud over 13,000+ image dataset collected by World Bank Tanzania over the flood prone Msimbasi Basin, Dar es Salaam, Tanzania.
Local Split-Merge
-----------------

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:alt: image of OpenDroneMap orthophoto
:align: center
DTM/DSM
^^^^^^^

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Usage
=====
.. _docker-usage:
Docker
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Tutorials
---------
Below you will find step-by-step instructions for some common use cases.
Below you will find instructions for some common use cases.
Creating High Quality Orthophotos
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. figure:: images/orthophoto.png
:alt: image of OpenDroneMap orthophoto
:align: center
Without any parameter tweaks, ODM chooses a good compromise between quality, speed and memory usage. If you want to get higher quality results, you need to tweak some parameters:
* ``--orthophoto-resolution`` is the resolution of the orthophoto in cm/pixel. Decrease this value for a higher resolution result.
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Creating Digital Elevation Models
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
By default ODM does not create DEMs. To create a digital terrain model, make sure to pass the ``--dtm`` flag.
By default ODM does not create DEMs. To create a digital terrain model, make sure to pass the ``--dtm`` flag. To create a digital surface model, be sure to pass the ``--dsm`` flag.
.. figure:: images/digitalsurfacemodel.png
:alt: image of OpenDroneMap derived digital surface model
:align: center
For DTM generation, a Simple Morphological Filter (smrf) is used to classify points in ground vs. non-ground and only the ground points are used. The ``smrf`` filter can be controlled via several parameters: