Changes to deep zoom scale bar for Visium CytAssist Spatial Gene Expression, 11mm

[brianraymor]

Context

From cell-sci-applications:

@kaloster wrote:

Hey Brian, the 11mm assay does affect calculations for the deep zoom scale bar in Explorer - we’re currently basing the calculation on a default 8mm slide for Visium.
This means that we would have to add a field to identify the assay type in CXG’s uns[“spatial”] object as part of the conversion script, and in turn add the relevant conditions for calculation on the Explorer side of things. I can start working on that later on today

Calculate scale bar by setting slide size based on assay_ontology_term_id available from the dataset metadata