Changes between Version 9 and Version 10 of Processing/Visualisation


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Timestamp:
Oct 10, 2013 9:58:07 AM (5 years ago)
Author:
edfi
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  • Processing/Visualisation

    v9 v10  
    33== Simple Model (DEM and Image overlay) ==
    44== Intro ==
    5 Geovisionary is a software package developed by the British Geological Survey (BGS) and Virtalis for creating visualisations of large and complex datasets. The data can be viewed within a 3D environment demonstrating the spatial relationships. We are currently running the 1.0.5.0 version of the software which only supports DEMs for height information where as the latest version will now accept point clouds.
     5Geovisionary is a software package developed by the British Geological Survey (BGS) and Virtalis for creating visualisations of large and complex datasets. The data can be viewed within a 3D environment demonstrating the spatial relationships. We are currently running the 1.0.5.0 version of the software which only supports DEMs for height information whereas the latest version will now accept point clouds.
    66
    7 The following instructions will show one method of ARSF data to create a simple elevation model with a image overlay. Firstly the data needs to be converted into a usable format, using a the converter_gui application (this is external to Geovisionary itself).
     7The following instructions will show one method of ARSF data to create a simple elevation model with a image overlay. Firstly the DEM and related imagery needs to be converted into a compatible format. This is achieved by using the converter_gui application (which is external to Geovisionary itself).
    88
    9 Firstly taking a pre-existing DEM (see DEM instructions), convert into grey float format under the format tab. Next convert the overlay images (GeoTiff seemed to be the most successful format) into RGB. These conversions can sometimes take a bit of time depending on the size of the files. A number of different image types are supported but GeoTiffs were the most successful format from previous attempts. Also it should be noted that if image overlap then areas can be occluded by another image. It is therefore best to use a mosaicked image of the whole AOI (area of interest).
     9So within the converter_gui take a pre-existing DEM (see DEM instructions) and convert it into the grey float format (option under the format tab). Next using the same program convert the overlay images into RGB. These conversions can sometimes take a bit of time depending on the size of the files. A number of different image types are supported but GeoTiffs were the most successful format from previous attempts. Also it should be noted that if image overlap then areas can be occluded by another image. It is therefore best to use a mosaicked image of the whole area of interest.
    1010
    11 Once the files have been converted they can then be loaded into Geovisionary. The converted DEM files need to be loaded in as height data. This should then create a 3D model of the terrain. If your creating this model with a standard ARSF DEM it is likely the the resolution of the model will vary across the scene. This is as a result of other height information data being using during the generation of the DEM e.g. ASTER data.
     11Once the files have been converted they can then be loaded into Geovisionary. The converted DEM files need to be loaded in as height data. This should then create a 3D model of the terrain. If your creating this model with a standard ARSF DEM it is likely the the resolution of the model will vary across the scene. This is as a result of other height information data being patched to the LiDAR during the generation of the DEM e.g. ASTER data. The converted mosaicked RGB can then be added as an imagery layer. 
    1212
    13 == Creating a movie (and changing layers?) ==
     13== Creating a movie (and changing layers) ==
     14
     15To change layers during the video recording the layers need to turned on/off or faded during the recording process. As the video is recorded effectively by screen grab changing the layers needs to be done in real time. If you need to turn off or load new layers this can take a moment or two to take effect. Also due to the screen grabbing approach to recording it is also important not to overlay any other windows as these will become incorporated into the video (this included the map overview in the corner!).
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    1517[wiki:Processing Return to Processing page ] - linked