how do I change the GPSAltitude() EXIF definition to ellipsoid height when I bring in images with ccmasterkernel?

Kevin Dawson — Thu, 21 Jul 2022 18:07:42 GMT

I am currently importing photos EXIF data into ccmasterkernel and they are coming in as MSL. how do I set them to come in as WGS84 (ellipsoid height) instead. in the GUI, when I add photos there is an option to specify MSL or WGS84. is there something like this in the scripting tools?

thanks for any help.

ccmasterkernal process to import photo pose data from csv

Kevin Dawson — Wed, 13 Jul 2022 03:23:03 GMT

I have been using CC successfully, and now I'm trying to transition to the python script. Our current process involves importing the image pose data from a csv file in a local northing easting elevation format. However I cant find a python command to import just the pose data. I tried to use the import_txt.py but it will only create a relative block and not hold the pose data. Has anyone got the ccmasterkernel to work with an arbitrary local coordinate system in feet?

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Wed, 13 Jul 2022 01:32:00 GMT

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Aerotriangulation. problem with importing data from csv file

Tomasz Zięba — Mon, 06 Jun 2022 07:53:24 GMT

Hi,

I got a problem with aerotriangulation results when importing data from an external CSV file. I mean when I make aerotriangulation with the addPhotoInAutoMode method everything is fine. But when I try to import GPS data from external CSV file earotriangulation works but its results are different. Tie points are rotated differently in regards to the word matrix.

These are aerotriangulation results when I got metadata from xlif.

And these are results when I use external csv file:

These are CSV data samples:

Name Alt Lat Long
DSC00634_t.JPG 1064.658 46.40924 -114.13910000000001
DSC00541_t.JPG 1075.346 46.40921 -114.13900000000001
DSC00756_t.JPG 1062.16 46.40916 -114.13900000000001
DSC00675_t.JPG 1070.784 46.40903 -114.13910000000001
DSC00366_t (1).JPG 1075.73 46.409099999999995 -114.13910000000001

My code look like this:

# --------------------------------------------------------------------

# create project

# --------------------------------------------------------------------

projectName = os.path.basename(config['aerotriangulationDirPath'])

project = ccmasterkernel.Project()

project.setName(projectName)

project.setDescription('Automatically generated from python script')

project.setProjectFilePath(os.path.join(config['aerotriangulationDirPath'], projectName))

err = project.writeToFile()

if not err.isNone():

print(err.message)

sys.exit(0)

print('Project %s successfully created.' % projectName)

print('')

inputSRS = ccmasterkernel.SRS("WGS84")

ECEF_SRS = ccmasterkernel.SRS("EPSG:4978")

toECEF = ccmasterkernel.SRSTransformation(inputSRS, ECEF_SRS)

################

# block = createBlock(project)

# --------------------------------------------------------------------

# create block

# --------------------------------------------------------------------

block=ccmasterkernel.Block(project)

block.setPositioningLevel(ccmasterkernel.PositioningLevel.PositioningLevel_georeferenced)

project.addBlock(block)

photogroups = block.getPhotogroups()

photogroups.addPhotogroup( ccmasterkernel.Photogroup() )

photogroup = photogroups.getPhotogroup(photogroups.getNumPhotogroups() - 1)

# --------------------------------------------------------------------

# parse input txt file

# --------------------------------------------------------------------

firstPhoto = True

inputFilePath = getPhotoLocationsFilePath()

with open(inputFilePath, 'r') as csvfile:

rd = csv.reader(csvfile, skipinitialspace=True)

next(rd)

for row in rd:

inputP = ccmasterkernel.Point3d(float(row[2]), float(row[1]), float(row[3]))

ecefP = toECEF.transform(inputP)

if ecefP == None:

print('Invalid coordinates')

sys.exit(0)

imageFilePath = os.path.join(

os.path.dirname(config['photosDirPath']), row[0])

if not os.path.isfile(imageFilePath):

print('File ' + imageFilePath + ' does not exist')

continue

photo = ccmasterkernel.Photo(imageFilePath, IMAGEDIMENSIONS)

photo.pose.center = ecefP

if firstPhoto:

firstPhoto = False

photogroup.setupFromPhoto(photo)

photogroup.focalLength_mm = FOCALLENGTH_MM

photogroup.addPhoto(photo)

block.setChanged()

block.exportToKML(os.path.join(config['aerotriangulationDirPath'], 'block.kml'))

This code base was obtained from ContextCapture MasterKernel Python SDK - example script import_txt.py file.

What could also be important is that at the end of that script is exportToKML but I got an error message: "Failed to transform coordinates."

Could you help me? Maybe I am missing something here but I don't know what. I thought that this is something with coordinates system transformations but I couldn't solve it.

Any help will be appreciated.

Tomasz

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how do I change the GPSAltitude() EXIF definition to ellipsoid height when I bring in images with ccmasterkernel?

ccmasterkernal process to import photo pose data from csv

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Aerotriangulation. problem with importing data from csv file