====== Bentley ContextCapture Oblique ======

This page describes the original Bentley ContextCapture oblique mapping resources for Orbit import. 

Use the corresponding [[227:desktop_ext:mapping:manage_import:templates|Orbit Import Template]] to import the described original data. \\
It is recommend to read first [[227:technology:3d_mapping:about_resources|]].

===== Oblique Images =====

=== Image files ===

  * Image type : Preferably undistorted (corrected distortion and Central Principal Point) planar images.
  * File format : Each image is one *.tif file.
  * File name : Corresponds to the name in the image positions file, see below.


===  Image Positions File and Camera Calibration ===
*.xml Bentley export __//X-right Y-down Yaw, Pitch, Roll angles//__\\
Camera calibration information is included in the Bentley export.
  * Value of Coordinates "X;Y;Z" : Any [[227:technology:core:crs|supported coordinate system]], decimal notation, without thousands separator.
  * Value of Angles "Yaw, Pitch, Roll" : [[[[227:technology:3d_mapping:supported_resources]], degrees.
  * File format : One *.xml file for all cameras having <Photogroup></Photogroup> tag enclosing all images taken with one camera.
<note tip> To import multiple cameras it is necessary to do some minimal manual editing of the *.xml file exported from Bentley: starting from the 2nd Photogroup the name\ID of the Photogroup should be included in the tag <Photogroup> (opening and closing) and every Photogroup has to correspond to a camera and will be placed in a separate planar folder.\\
So the first <Photogroup> tag stays the same, second should is changed into <Photogroup-2>, 3rd into <Photogroup-3> and so on.\\
In case there is only one camera in the project no editing has to be done!
 </note>

<code>
<?xml version="1.0" encoding="utf-8"?>
<BlocksExchange version="3.2">
	<SpatialReferenceSystems>
		<SRS>
			<Id>0</Id>
			<Name>WGS 84 / UTM zone 36N (EPSG:32636)</Name>
			<Definition>EPSG:32636</Definition>
		</SRS>
	</SpatialReferenceSystems>
	<Block>
		<Name>Block_20 (merged block) - AT no color - AT rigid - AT</Name>
		<Description>Result of aerotriangulation of Block_20 (merged block) - AT no color - AT rigid (2018-Apr-17 18:36:18)</Description>
		<Type>Aerial</Type>
		<SRSId>0</SRSId>
		<Photogroups>
			<Photogroup>
				<Name>Photogroup 1</Name>
				<ImageDimensions>
					<Width>4864</Width>
					<Height>3232</Height>
				</ImageDimensions>
				<CameraModelType>Perspective</CameraModelType>
				<CameraModelBand>Visible</CameraModelBand>
				<FocalLength>405.922840835919</FocalLength>
				<SensorSize>48.64</SensorSize>
				<CameraOrientation>XRightYDown</CameraOrientation>
				<PrincipalPoint>
					<x>2243.31129670427</x>
					<y>1558.26631705849</y>
				</PrincipalPoint>
				<Distortion>
					<K1>-0.190265209845049</K1>
					<K2>1.12316439250243</K2>
					<K3>0.00875215058070689</K3>
					<P1>-9.14796e-05</P1>
					<P2>-0.000529222</P2>
				</Distortion>
				<AspectRatio>1</AspectRatio>
				<Skew>0</Skew>
				<Photo>
					<Id>0</Id>
					<ImagePath>U:/Data/wwwroot/Files/Orbit/Arara/281474976845088_1.tif</ImagePath>
					<Component>1</Component>
					<Pose>
						<Rotation>
							<Yaw>96.7390400290272</Yaw>
							<Pitch>-81.2759334494381</Pitch>
							<Roll>-175.637035185076</Roll>
						</Rotation>
						<Center>
							<x>693470.245763582</x>
							<y>3449436.37256463</y>
							<z>2493.59170858562</z>
						</Center>
					</Pose>
					<NearDepth>1354.14883099397</NearDepth>
					<MedianDepth>2043.12711992778</MedianDepth>
					<FarDepth>2256.82995800756</FarDepth>
					<ExifData>
						<ImageDimensions>
							<Width>4864</Width>
							<Height>3232</Height>
						</ImageDimensions>
						<Make>Adobe Systems Inc.</Make>
						<Model>Tiff File</Model>
					</ExifData>
				</Photo>
				<Photo>
				...
				</Photo>

			</Photogroup>
			<Photogroup-2>
			...
			</Photogroup-2>
		</Photogroups>                                
</code>

===== LiDAR or Point Cloud generated by Dense Matching (optional) =====

=== Point cloud files ===

  * File format : One or more *.las or *.laz files.
  * File structure : Las version 1.2.
  * Value of Latitude, Longitude, Elevation : Same CRS as Image Positions.

===== DEM (optional) =====

=== Raster file ===

  * File : one *.tif file with corresponding *.tfw
  * Naming : free of choice
  * Crs : Any supported projected coordinate system can be used, but all imported oblique resources should have the same crs.