Specialists. Riprap runs nine independent specialists per query: NYC DCP Geosearch, Sandy Inundation Zone (NYC OD), three DEP Stormwater scenarios, FloodNet sensor network, NYC 311, USGS 3DEP LiDAR-derived terrain (elevation percentile + TWI + HAND), USGS STN Hurricane Ida 2021 high-water marks, Prithvi-EO 2.0 satellite water segmentation, and Granite Embedding RAG over NYC resilience plans. A specialist that produces no grounded data emits no document.
Tier rubric. Sandy 2012 zone: +3. DEP Extreme 2080 footprint: +2. DEP Moderate 2050 footprint: +2. DEP Moderate current: +1. Three or more 311 flood complaints in 200 m, last 5 yr: +1. FloodNet sensor with ≥1 event in 400 m: +1. RAG hit naming this asset class: +1. Tier 1 if score ≥ 6, Tier 2 if 4-5, Tier 3 if 2-3, Tier 4 if 1, Tier 0 if 0.
Hallucination guardrail. Every numerical token in the Granite-generated paragraph is verified to appear in the source documents; sentences with ungrounded numbers are dropped. The Granite output is grounded via the model's native document-role chat template (Granite 4.1 / Ollama).
Numbered sources for this assessment