Scans the schema for the specified attributes are returns a single CRS
if all the geometric attributes in the lot share one CRS, null if
there are different ones
Returns the rendering buffer, a measure in pixels used to expand the geometry search area
enough to capture the geometries that do stay outside of the current rendering bounds but
do affect them because of their large strokes (labels and graphic symbols are handled
differently, see the label chache).
Gets a lucene filter that filters out documents not contained in this
subset of documents and docs whose timestamp is greater than this
models cache element timestamp.