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Structure
Structured architectural data, not images of plans
Auto-traced plans yield a single undifferentiated set of paths. These plans are drawn on the AIA layer convention, so walls are separable from furniture and annotation from architecture without prior segmentation. All 50 plans in the public sample carry the 20 layers below.
| Layer | Contents | Layer | Contents |
|---|---|---|---|
| A-WALL | Wall geometry | A-FLOR-BALC-RAIL | Balcony railings |
| A-WALL-FILL | Wall poche | A-FLOR-COVR | Floor coverings |
| A-DOOR | Doors and swings | A-FLOR-PLAT | Platforms |
| A-GLAZ | Windows and glazing | A-ANNO-DIMS | Dimension chains |
| S-COLS | Structural columns | A-ANNO-TEXT | Room labels |
| A-FURN | Furniture | A-ANNO-SCHED | Door and window schedules |
| A-FLOR-FIXT | Fixtures | A-ANNO-NORTH | North arrow |
| A-FLOR-FIXT-FILL | Fixture fills | A-ANNO-SCALEBAR | Scale bar |
| A-FLOR-WET | Wet areas | A-ANNO-OPENING-MARKS | Opening marks |
| A-FLOR-BALC | Balconies | A-ANNO | General annotation |
Room labels appear as a regular quartet — name, metric dimensions, imperial dimensions, area — so room polygons, adjacency graphs and area regression targets are recoverable from the drawing itself. Median 139 live text nodes and 275 path elements per plan, measured on the sample.
Sample plans
Distribution
Composition of the collection
The distribution reflects residential construction in India and is stated here because it will be computed in the first evaluation hour.
By unit type
| Unit | Plans |
|---|---|
| 3 BHK | 153,454 |
| 2 BHK | 72,372 |
| 4 BHK | 54,955 |
| 1 BHK | 15,315 |
| Studio | 3,904 |
By footprint
| Footprint | Plans |
|---|---|
| L-shaped | 209,879 |
| T-shaped | 65,694 |
| Rectangular | 17,600 |
| Stepped | 4,015 |
| U-shaped | 1,485 |
| Notched | 1,327 |
By carpet area, sq ft
| Band | Plans |
|---|---|
| Under 500 | 10,323 |
| 500–749 | 8,989 |
| 750–999 | 37,057 |
| 1,000–1,249 | 167,452 |
| 1,250–1,499 | 50,226 |
| 1,500–1,749 | 23,268 |
| 1,750 and above | 2,685 |
Facing: west 105,511; south 97,272; north 78,774; east 18,443. Vastu-aligned: 66,900 (22.3%). Three-bedroom plans and L-shaped footprints dominate, and areas cluster between 1,000 and 1,249 sq ft. A release can be sampled to a target balance, or under-represented classes drawn to order.
Metadata
Twenty-one fields per plan
One CSV row per file accompanies the pack. The row below is taken from the public sample index.
# metadata/sample_index.csv — one row per file unit STUDIO file 54005626_furnished.svg carpet_sqft 369 carpet_m2 34.31 rooms 5 toilets 1 attached_toilets 0 balconies 1 master_balcony 0 footprint L circulation open distribution facing N vastu 0 dimensions metres palette olive typeface geometric symbols duvet-plain detail minimal balcony_style railing score 98.1 size_kb 21.0
Applications
Training objectives served by the collection
Plan understanding
Room detection, area regression, unit-type classification and adjacency extraction, with labels derived from the drawing rather than from an annotator’s reading of it.
Conditional layout
Given a footprint, an area budget and a room programme, produce a plan. The metadata supplies the conditioning variables directly.
Raster to CAD
Every plan renders deterministically to an image, so each file is an aligned pair for training image-to-vector conversion on technical drawings.
Drawing question answering
Questions with verifiable answers — number of bedrooms, orientation of the master bedroom, balcony area — grounded in live text that requires no OCR.
Evaluation access, licensing terms and the contact form are on the overview.