Extracting Rooftop aerial imagery using Alteryx

[DMI10000]

Hi all,

I am new to working with spatial data. Still, I am trying to build a model to extract the rooftop aerial imagery of houses in Auckland (New Zealand) so I can perform image classification.  

I am having a hard time figuring out how to extract the images so I do not have to focus on the vegetation but just the rooftops.

The first link below gives an example of aerial imagery while the second link maps the aerial imagery with the outline. Now, I am interested in the jpg image of the rooftop for my classification.

link 1: https://data.linz.govt.nz/layer/95497-auckland-0075m-urban-aerial-photos-2017/

link 2: https://data.linz.govt.nz/layer/101290-nz-building-outlines/

Please any workflow or help will be appreciated. Any questions, I am happy to furnish with more clarity.

BTW, the images can all be downloaded free. For downloads above 15GB, you just need to reduce the resolution to 1/4. 

Thanks.

David

[Ben_H]

@DMI10000,

Not sure on that one to be honest, I can't get the new version to install so I can't test it.

It might be worth opening the Macro and re-saving it then add it back into the workflow.

Regards,

Ben