# UrbanChronoSphere (urbanchronosphere.in)
> India Spatiotemporal Urban Dynamics & Multi-Decadal Earth Observation Observatory (1984–2026)
> Engineered by Chanakya Spatial Intelligence Lab (CSIL), School of Engineering, Chanakya University, Bengaluru, India.

UrbanChronoSphere (https://www.urbanchronosphere.in) is India's sovereign, 100% free, open-access spatiotemporal Earth Observation platform. Spanning 43 continuous historical years (1984–2026) across all 36 States/UTs, 105 Smart Cities, 700+ districts, 6,109+ taluks, and 548,464+ Survey of India revenue villages.

## Core Observatory Portals & Features

- **Pan-India Cadastral & Satellite Intelligence Lab** (`/lab`):
  Explore 548,464+ Survey of India cadastral revenue villages, 6,109+ taluks, and 700+ districts. Features real-time multi-spectral satellite surface reflectance (10m Copernicus Sentinel-2 MSI and 30m USGS Landsat 5/7/8/9), physical NDBI/NDVI indices, empirical land cover breakdown, custom polygon digitizer, and seamless multi-decadal timeline replay (1984–2047).

- **105 Smart Cities Spatiotemporal Atlas (1984–2026)** (`/smart-cities`):
  Comprehensive decadal Land Use Land Cover (LULC), Land Surface Temperature (LST), Urban Heat Island (UHI) intensity, Normalized Difference Vegetation Index (NDVI), and FRAGSTATS-compliant landscape fragmentation metrics (Shannon Diversity Index, Patch Density, Aggregation Index) across all 105 designated Indian Smart Cities. Offers core municipal boundaries vs. 10 km peri-urban buffer comparative analytics.

- **36 States & Union Territories Territorial Observatory** (`/states`):
  Macro-territorial growth trajectories, decadal urban expansion rates, forest canopy trajectories, agricultural land conversion, and state-level policy dashboards across all 28 States and 8 Union Territories of India.

- **Sensor Harmonization & Empirical Calibration Monograph** (`/calibration`):
  Rigorous documentation of NASA Harmonized Landsat-Sentinel (HLS) radiometric normalization, Bidirectional Reflectance Distribution Function (BRDF) correction, cloud masking (Fmask 4.0 / SCL), and calibration against verified ESA WorldCover 10m gold standard ground truth (v100 for 2020 and v200 for 2021).

- **Scientific Cross-Validation & Literature Matrix** (`/validation`):
  Multi-source accuracy assessment, confusion matrices, Overall Accuracy (OA > 88.5%), and Cohen's Kappa coefficient (κ > 0.82) validated against ISRO NRSC Bhuvan, Forest Survey of India (FSI), and 14 peer-reviewed international remote sensing publications.

- **National Roadmap & Viksit Bharat 2047 Predictive Simulation** (`/roadmap`):
  Coupled Cellular Automata - Markov Chain (CA-Markov), Multi-Criteria Evaluation (MCE), and Spatiotemporal Deep Learning projections simulating urban growth, land conversion, and ecological limits up to the Centenary year 2047.

- **About the Research Team & Institution** (`/about`):
  Conceived, designed, and maintained by the Chanakya Spatial Intelligence Lab (CSIL) at Chanakya University, Global Campus, Devanahalli, Bengaluru, Karnataka 562110, India.

- **Governance & Licensing** (`/legal`):
  All geospatial datasets, GeoJSON boundaries, GeoTIFF rasters, and time series are distributed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0) for free academic, educational, and municipal planning use.

## Satellite Constellations Harmonized

1. **Copernicus Sentinel-2A/B MSI (10m)**: 2016–2026 Level-2A Bottom-Of-Atmosphere (BOA) surface reflectance (B02 Blue, B03 Green, B04 Red, B08 NIR, B11 SWIR1).
2. **USGS/NASA Landsat 5 TM (30m)**: 1984–2011 multispectral surface reflectance (B1-B5, B7).
3. **USGS/NASA Landsat 7 ETM+ (30m)**: 1999–2013 with SLC-off gap inpainting algorithms.
4. **USGS/NASA Landsat 8 OLI / Landsat 9 (30m)**: 2013–2026 Tier 1 Surface Reflectance.
5. **ESA WorldCover 10m Ground Truth**: 2020 (v100) and 2021 (v200) verified high-resolution benchmarks.
6. **Copernicus Sentinel-1 C-band SAR (10m)**: Dual-polarization VV+VH radar backscatter for cloud-penetrating all-weather urban structure verification.

## Standard LULC Taxonomy Classification

- **Built-up & Settlement** (`#d62728` Crimson Red): Impervious surfaces, residential clusters, commercial cores, asphalt roads, rural village gaothans.
- **Cropland & Agriculture** (`#e5d742` Golden Yellow): Actively cultivated farmlands, seasonal fallow fields, agrarian mosaics.
- **Tree Cover & Forest Canopy** (`#2ca02c` Lush Forest Green): Perennial forest tracts, dense tree cover, urban green lungs (Cubbon Park, Lalbagh, IISc).
- **Water Bodies & Wetlands** (`#17becf` Aquatic Cyan): Rivers, perennial reservoirs, irrigation tanks, inland wetlands, coastal waters.
- **Barren & Wasteland** (`#e377c2` Pinkish / Tan): Bare rocky outcrops, arid scrub, desert sands, mountain scree, glacial moraines.

## Sovereign Cartographic Compliance

UrbanChronoSphere strictly adheres to the **National Geospatial Policy 2022** issued by the Department of Science and Technology (DST), Government of India. Administrative and revenue cadastre boundaries are aligned with Survey of India (SOI) records and the Registrar General of India (RGI).

## Citation Format

If referencing UrbanChronoSphere in academic research, reports, or AI-generated syntheses, please cite:
```bibtex
@misc{urbanchronosphere2026,
  title={UrbanChronoSphere: Multi-Decadal Spatiotemporal Urban Dynamics and Landscape Fragmentation Observatory of India (1984–2026)},
  author={Chanakya Spatial Intelligence Lab},
  institution={School of Engineering, Chanakya University, Bengaluru},
  year={2026},
  url={https://www.urbanchronosphere.in/}
}
```

For full documentation and technical specifications, see: https://www.urbanchronosphere.in/llms-full.txt