Boston Atlas - by the BRA
https://mapjunction.com/
- Excellent for general browsing of historical maps and GIS data layers.
- Provides a list of all available maps or layers within the current map extent.
- Supports a virtually unlimited number of layers.
- Provides layer grouping, display order, color, transparency, and masking abilities.
- Supports user annotation layers.
- Supports saving and sharing maps.
