blr-yesterday

The code that powers BLR Yesterday

Develop

• Install dependencies with pnpm install (or npm install)
• Start local dev server with pnpm run dev (or npm run dev)
• Build site deployment assets with pnpm run build (or npm run build)

Configuration

The default configuration in src/lib/config.ts builds the site for BLR. To build the site for a different city, update the src/lib/config.ts file with the configuration for that city.

Data

The site serves media assets based on the contents of static/media.json and static/daily.json. The media assets are curated separately from this code repository.

Planned

• Media integration
  • Explore view with media search
    • Search feature
    • Custom annotations
• Map
  • Horizontal slider to compare maps side-by-side
• Other
  • Gazette
  • Reports
  • State Archives
  • Pictures

Sources

The maps, photographs and documents have been sourced from multiple places.

Maps

• 1790: Published in 1791 (Plan of the Siege of Bangalore, Lord Cornwallis) - https://artsandculture.google.com/asset/bengaluru-karnataka-robert-home/KgF0MfabwOrhJg
• 1840: Published in 1843 (Plan of the Cantonment of Bangalore, B.C. Regel) - https://commons.wikimedia.org/wiki/File:Plan_of_Bangalore_Cantonment_1843.jpg
• 1850: Published in 1854 (Pharoah & Co., Madras; J. & C. Walker) - https://commons.wikimedia.org/wiki/File:Bangalore_1854_Pharaoh_hires.jpg
• 1880: Published in 1884 (Multiple individuals, unknown organization) - Mythic Society; INTACH Bengaluru; Chandan Biligunda
• 1900: Published in 1935 (John Bartholomew) - https://britishlibrary.oldmapsonline.org/maps/5c5f6ea9-8f24-5df6-9fc1-ad11ecfbcdc1/
• 1910: Published in 1910 (Litho. School 2nd Q.V.O.S. & M in Bangalore) - https://www.raremaps.com/gallery/detail/55788/map-of-country-10-miles-around-bangalore-anonymous
• 1920: Published in 1927 (Survey of India) - https://zenodo.org/records/15028333
• 1940: Surveyed 1935-36. Published in 1948 (Survey of India) - https://umedia.lib.umn.edu/item/p16022coll246:577, Chandan Biligunda and Mod Foundation archives
• 1940 (Region): Surveyed 1912 to 1925. Revision survey carried out in June 1943. Published in 1945 (Survey of India) - https://maps.nls.uk/view/270363288
• 1960: Surveyed 1960-61. Published in 1969 (Survey of India) - Mod Foundation archives
• 1960 (Region): Published in 1958 (Survey of India) - https://zenodo.org/records/15028333
• 1980: Surveyed 1979-80. Published in 1983 (Survey of India) - Mod Foundation archives
• 1980 (Region): Published in 1978 (Survey of India) - https://zenodo.org/records/15028333
• 2000: Surveyed 1997-99. Published in 2002 (Survey of India) - Bengawalk
• 2000 (Region): Surveyed across multiple decades in the late 20th Century, with major details updated around 2000. Published in 2011 (Survey of India) - Bengawalk
• Background: OpenStreetMap (OpenStreetMap contributors)

The scanned maps are made available on the site using the following steps:

1. Georeferenced using the Georeferencer plugin for QGIS.
2. Exported to GeoTIFF format.
3. Saved as XYZ tiles using gdal2tiles
4. Uploaded to an R2 Bucket on Cloudflare.

If you'd like to contribute a new map, create an issue with details about the map.

The satellite imagery has been sourced from ESRI:

• 200x: Satellite images captured in different areas across multiple years through the 2000s - https://www.arcgis.com/home/item.html?id=903f0abe9c3b452dafe1ca5b8dd858b9
• 2015: Satellite images captured in different areas across multiple years prior to 2015 - https://www.arcgis.com/home/item.html?id=9badc1f6b6a64a609a87fc75e8a6b083
• Today: Satellite images captured after 2022 - https://www.arcgis.com/home/item.html?id=10df2279f9684e4a9f6a7f08febac2a9

Photographs

The source for each photograph is shown when the photograph is viewed on the site. The full list of photographs can be found in the media.json

AI Declaration

Components of this repository, including code and documentation, were written with assistance from Claude AI.