Used by Layer's and Feature's M-Values
Must be an object of key values
all keys will be the same, values will be different
A layer's Shape defines what the properties look like for every Feature in that layer
so we only have to store the properties and M-Value shape once per layer.
Create shapes
Used by Layer's and Feature's M-Values Must be an object of key values all keys will be the same, values will be different A layer's Shape defines what the properties look like for every Feature in that layer so we only have to store the properties and M-Value shape once per layer.