Step 1 – Draw the Land and the Water
- Step 1a – Take a series of screenshots from David Rumsey’s GeoGarage for the 1853 Coat Survey map overlay and the corresponding current Google Map, at zoom level 16. Continue until entire area to be mapped has been captured.
- Step 1b – Assemble all screenshots into a single and fully-aligned Photoshop document, creating a Photoshop layer for 1853 and another for 2011. Import Photoshop layers into Illustrator file as linked images.
- Step 1c – In Illustrator, trace coastlines from 1853 layer, creating a contiguous vector outline. (Yes, this takes forever)
- Step 1d – Download the current street centerlines file from the San Francisco GIS Data Catalog, using MAPublisher to convert SHP file to Illustrator. Insert lines into working Illustrator file and manually adjust to account for differences between Google Map’s Mercator projection and the SHP file’s Lambert Conformal Conic projection, acheiving alignment between SHP lines and street alignments to approximate the Google Map layer. (NB – if anyone can help me do this correctly, using math instead of trial and error, please contact me)
Step 2 – Draw the 1853 Streets, Places, and Buildings
- Step 2a – Create master spreadsheet of all possible street segments for 1853, block by block, using Parker’s City Directory street listing as a starting point, reconciling against the 1853 survey map.
- Step 2b – Compare each possible street segment against available contemporary maps and impossibilities due to coastlines. Delete or add streets as needed.
- Step 2c – Check map against street segments displayed in SFDPW’s dedication keymap. Add discontinued streets, redraw realigned streets, etc.
- Step 2d – Create object groups in Illustrator for each street. Apply stroke width and color to each group, appropriate to street width and significance for each block segment. Name each layer per 1853 street name.
- Step 2e – Add street name captions to each street.
- Step 2f – Catalog all place names, including bays, points, wharves, parks, etc. Add appropriate coloring to denote public spaces, hospitals, military outposts, etc. Add name captions for each.
- Step2g – Trace all building outlines from 1853 map, save as separate layer and apply appropriate stroke and fill color.