Commit 14ae933a authored by Jørgen Lind's avatar Jørgen Lind
Browse files

Update JupyterNotebook example to use url

parent 67e71641
%% Cell type:code id: tags:
``` python
import openvds
import matplotlib.pyplot as plt
import matplotlib
import matplotlib.image as mpimg
import numpy as np
import time
%matplotlib inline
matplotlib.rcParams['figure.figsize'] = (16, 16)
%% Cell type:markdown id: tags:
## Open a VDS connection and get the Layout object for the connection
Specific OpenOptions has to be used to open a connection to different cloud vendors. The AWS open options also relies on the AWS standardized credentials file in $HOME/.aws/credentials
Specific OpenOptions can to be used to open a connection to different cloud vendors. The AWS open options also relies on the AWS standardized credentials file in $HOME/.aws/credentials
Alternativly a url and connection string pair can be used. This scheme is descibed here:
%% Cell type:code id: tags:
``` python
error = openvds.Error()
openOptions = openvds.AWSOpenOptions("bucket", "folder_in_bucket", "region")
#openOptions = openvds.AWSOpenOptions("bucket", "folder_in_bucket", "region")
#openOptions = openvds.AzureOpenOptions("connection_string", "container", "blob") #blob is ignored for now
#openOptions = openvds.GoogleOpenOptions("bucket", "folder_in_bucket")
vds =, error)
#vds =
vds ="some url", "optional connection string")
layout = openvds.getLayout(vds)
%% Cell type:markdown id: tags:
## Layout
The layout can be used to retrieve properties about the VDS.
%% Cell type:code id: tags:
``` python
print("ChannelCount: {}".format(layout.getChannelCount()))
for i in range(layout.getChannelCount()):
print(" Channel Name: {}".format(layout.getChannelName(i)))
print(" Value range: {} - {}".format(layout.getChannelValueRangeMin(i), layout.getChannelValueRangeMax(i)))
print("Dimensionality: {}".format(layout.getDimensionality()))
for i in range(layout.getDimensionality()):
print(" Dimension name: {}".format(layout.getDimensionName(i)))
print(" Number of samples: {}".format(layout.getDimensionNumSamples(i)))
print(" Coordinate min max {} - {}".format(layout.getDimensionMin(i), layout.getDimensionMax(i)))
%% Cell type:markdown id: tags:
## Metadata accessor
Metadata can be accessed through the layout objects getMetadataXX function. The type is part of the key and no implicit conversion will occur.
- getMetadataInt
- getMetadataIntVector2
- getMetadataIntVector3
- getMetadataIntVector4
- getMetadataFloat
- getMetadataFloatVector2
- getMetadataFloatVector3
- getMetadataFloatVector4
- getMetadataDouble
- getMetadataDoubleVector2
- getMetadataDoubleVector3
- getMetadataDoubleVector4
- getMetadataString
- getMetadataBLOB
%% Cell type:code id: tags:
``` python
MetaType = openvds.MetadataType
if layout.isMetadataDoubleVector2Available("SurveyCoordinateSystem", "Origin"):
print("SurveyCoordinateSystem::Origin: {}".format(layout.getMetadataDoubleVector2("SurveyCoordinateSystem", "Origin")))
if layout.isMetadataDoubleVector2Available("SurveyCoordinateSystem", "InlineSpacing"):
print("SurveyCoordinateSystem::InlineSpacing: {}".format(layout.getMetadataDoubleVector2("SurveyCoordinateSystem", "InlineSpacing")))
if layout.isMetadataDoubleVector2Available("SurveyCoordinateSystem", "CrosslineSpacing"):
print("SurveyCoordinateSystem::CrosslineSpacing: {}".format(layout.getMetadataDoubleVector2("SurveyCoordinateSystem", "CrosslineSpacing")))
#layout.getMetadata("SEGY", "TextHeader", openvds.core.MetadataType.BLOB)
#layout.getMetadata("SEGY", "BinaryHeader", openvds.core.MetadataType.BLOB)
%% Cell type:markdown id: tags:
## The AccessManager api
The AccessManager api can be used to retieve data from the vds
%% Cell type:code id: tags:
``` python
accessManager = openvds.VolumeDataAccessManager(vds)
axisDescriptors = [layout.getAxisDescriptor(dim) for dim in range(layout.getDimensionality())]
sliceType = 'inline'
sliceIndex = 55
sliceDimension = 2 if sliceType == 'inline' else 1 if sliceType == 'crossline' else 0 if sliceType == 'timeslice' else 0 if sliceType == 'depthslice' else -1
min = tuple(sliceIndex + 0 if dim == sliceDimension else 0 for dim in range(6))
max = tuple(sliceIndex + 1 if dim == sliceDimension else layout.getDimensionNumSamples(dim) for dim in range(6))
req = accessManager.requestVolumeSubset(min, max, format = openvds.VolumeDataChannelDescriptor.Format.Format_R32)
height = max[0] if sliceDimension != 0 else max[1]
width = max[2] if sliceDimension != 2 else max[1]
data =, height).transpose()
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