This is a set of 24 maps of buildings around Melbourne's CBD, produced by Mahlstedt and Gee in 1888. They were published under the title "Standard plans of the city of Melbourne". They were digitised by the City of Melbourne and geo-referenced.

The same maps are avaiilable through the State Library of Victoria: http://handle.slv.vic.gov.au/10381/126848

To help you choose between the two sources, here are some of the differences:
- the SLV digitisations are higher quality, with fewer artefacts such as other maps bleeding through
- the SLV has a web viewer, enabling you to quickly view each map online
- the CoM versions are geo-referenced JPEG2000 files, meaning you can overlay them on a map
- the CoM files are available for bulk download

There is no copyright on these map images.