NG/README.md

OpenConstructionEstimate — Nigeria / Lagos

Construction Work Items, Components & Resources

---

Property	Value
Reference region	Nigeria / Lagos
ISO country	NG
Language	en
Currency	NGN (ISO 4217)
Source track	UK_GBP (United Kingdom / London)
Generated	2026-04-27
Work items	900,225 rows
Unique resources	6,670

Available Formats

Format	File
Parquet	NG_LAGOS_workitems_costs_resources_DDC_CWICR.parquet
Excel (formatted)	NG_LAGOS_workitems_costs_resources_DDC_CWICR_FORMATTED.xlsx
Excel (simple)	NG_LAGOS_workitems_costs_resources_DDC_CWICR_SIMPLE.xlsx
Catalog CSV	DDC_CWICR_NG_LAGOS_Catalog.csv
Catalog XLSX	DDC_CWICR_NG_LAGOS_Catalog.xlsx
Qdrant snapshot	NG_LAGOS_workitems_costs_resources_EMBEDDINGS_3072_DDC_CWICR.snapshot

How this track was built

This track was generated from UK_GBP by 0_Workflow and Pipelines CWICR/python/11-country-track-builder/add_country_track.py.

• Norms (labour hours, machine hours, resource quantities) are identical to the source track — Resource-Based Costing methodology treats norms as country-agnostic physical first principles.
• Prices are derived via the cascade type_factors → location_factor → optional national overrides. Type factors come from OECD wage indexes (labour), construction PPP (material), and ECB FX (equipment). FX snapshot date is recorded in the per-resource columns.
• Language columns are translated where target language differs from source. Existing tracks are used as parallel-text seeds.

Data Structure

85+ columns organised into:

• Classification hierarchy (10 cols)
• Rate / work-item identifiers (11 cols)
• Resource decomposition (7 cols)
• Labour metrics (11 cols)
• Machinery & equipment (12 cols)
• Price aggregates (16 cols)
• Mass / service / regional markers (~18 cols)

See the repository-level DATA_DICTIONARY.md for the complete column-by-column reference.

Qdrant collection

Vector index built from concatenated localised text fields, encoded with OpenAI text-embedding-3-large (3072-dim, cosine).

qdrant-client snapshot upload \
  --collection ddc_ng_lagos \
  --snapshot NG_LAGOS_workitems_costs_resources_EMBEDDINGS_3072_DDC_CWICR.snapshot

Licence

Same as the parent dataset: CC BY 4.0 for data, see LICENSE-DATA.txt. Code: see LICENSE-CODE.txt.