Dear Lukas,
The command you are running is incorrect. The input files needs to be an SPD
file and is just working on one tile.
You need to do the follow steps to use the tiling - which by the way can take
multiple flight lines and merge at a tile level.
1. Convert all input flight lines to SPD/UPD files. (spdtranslate)
2. Define the tiles for a bbox which includes all the data (spddeftiles)
3. Build the directory structure within which the tiling files will be stored.
(spdtiling --builddirs)
4. Tile the input SPD/UPD file(s) into the directory structure.
5. Loop through all the tiles and perform you analysis - i.e., merge tiles
components from different flight lines, ground classification, DEM
interpolations etc. (in what I sent you previously, this is file
BuildSPDProcessingLoadLeveler.py)
6. Merge raster outputs ignoring the overlap regions (spdtileimg --mosaic)
The tricky bit is step 5 where you need to define you processing steps which is
going to require some coding to automate. SPDLib is deliberately written like
this for flexibility in terms of what analysis you want to run and how it is
run on different platforms e.g., HPC with different job schedulers etc.
However, it does require some coding / computing thought from the user.
Best wishes,
Pete
****************************************************
* Dr Pete Bunting
* Reader in Remote Sensing
* Earth Observation and Ecosystem Dynamics Group
* Department of Geography and Earth Sciences
* Aberystwyth University
* Aberystwyth
* Ceredigion
* SY23 3DB
* UK
*
* Ph: +44 (0) 1970 622615
* Mob: +44 (0) 7917 842743
* Email: [email protected]
* ORCID: http://orcid.org/0000-0002-7435-0148
****************************************************
"Please consider the environment before printing this email or any documents
attached”
> On 16 Aug 2017, at 09:40, Lukas Graf <[email protected]> wrote:
>
> Dear Pete,
>
> it is me again. I still encounter some problems with the tiling process.
> After I created a xml-file using the spddeftiles command I tried to create
> the tiles. However, when using the merged spd file I only got an error
> message. I have to use the merged file as we are processing overlapping
> flightlines. In our first attempt we processed each flightline separatly and
> merged it in the end but the result was a DTM with lots of artefacts in the
> overlapping regions.
>
> The command I typed in was:
>
> spdtiling.exe --extractcore -t tiles.xml -i allFiles_merged.las -o \Tiles\
>
> The output I got:
> Tiles XML file: tiles.xml
> Input SPD file: allFiles_merged.las
> Output SPD file: \Tiles\
> Reading tile XML
> Error: Trying to convert "" - bad lexical cast: source type value could not
> be interpreted as target
> spdtiling - end
>
> Do you know if I made something wrong?
>
> Many thanks,
>
> Lukas
>
> Am 14.08.2017 um 13:38 schrieb Pete Bunting:
>> Dear Lukas,
>>
>> You need to tile the dataset rather than create one single huge file. I have
>> attached a zip file which has scripts which I have used for this workflow
>> before - on a UNIX HPC system using the loadleveler job scheduler so ignore
>> those bits, it just means to run the process for all the tiles. You’ll need
>> to adapt for windows.
>>
>> The main file you’ll want to look at is ProcessingSteps.txt which have the
>> steps listed. The tiling is performed with an overlap so you mosaic the
>> raster outputs where only the area not within the overlap region will be
>> included in the output mosaic.
>>
>> Hope that helps.
>>
>> Best wishes,
>>
>> Pete
>>
>>
>>
>>
>>
>> ****************************************************
>> * Dr Pete Bunting
>> * Reader in Remote Sensing
>> * Earth Observation and Ecosystem Dynamics Group
>> * Department of Geography and Earth Sciences
>> * Aberystwyth University
>> * Aberystwyth
>> * Ceredigion
>> * SY23 3DB
>> * UK
>> *
>> * Ph: +44 (0) 1970 622615
>> * Mob: +44 (0) 7917 842743
>> * Email: [email protected] <mailto:[email protected]>
>> * ORCID: http://orcid.org/0000-0002-7435-0148
>> <http://orcid.org/0000-0002-7435-0148>
>> ****************************************************
>> "Please consider the environment before printing this email or any documents
>> attached”
>>
>>> On 14 Aug 2017, at 11:02, Lukas Graf <[email protected]
>>> <mailto:[email protected]>> wrote:
>>>
>>> Hi there,
>>>
>>> I am currently working on a huge LiDAR dataset containing several
>>> flightlines that have been merged together using spdlib. As a next step I
>>> wanted to apply the Progressive Morphology Filtering algorithm to the
>>> merged dataset but the application didn't work anymore and I got an error
>>> message.
>>>
>>> The command I typed in was:
>>>
>>> spdpmfgrd.exe --overlap 10 -c 100 r 100 -i merged.SPD -o merged_grd.SPD
>>>
>>> The error massage I got was:
>>>
>>> Using native resolution for processing
>>> terminate called after throwing an instance of 'H5::PropListIException'
>>>
>>> This application has requested the Runtime to terminate it in an unusual
>>> way.
>>> Please contact the application's support team for more information.
>>> The size of merged.SPD is about 2,300 GB. I remeber having some issues with
>>> this runtime problem also using other software. Could this problem be
>>> related to MS Visual Studio Runtime Environment incompatibilies (I have
>>> several vcruntime.dlls on my computer)? I also tried the command on a other
>>> Win10 machine - with the same results. In addition, I also tried doing the
>>> task with smaller files but the results was the same. Also the size of the
>>> overlap and block size were changed but what ever I did it still remained
>>> the same. Unfortunatly I cannot provide the data as the use is restricted.
>>>
>>> Does anyone know a solution for this issue? Many thanks for your support.
>>>
>>> The Best,
>>>
>>> Lukas
>>>
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