01702: Rtgi

Author: [Your Name/Institution] Date: April 12, 2026

The City of Framingham’s Department of Public Works (DPW) and its utility partners (Eversource, National Grid, Aquarion Water) use internal RTGI codes to tag underground assets. If you see “RTGI 01702” on a construction blueprint or a stakeout flag, it likely indicates that a Real-Time Geospatial Index update is occurring for the 01702 service area. This helps crews avoid digging up the wrong side of the street. rtgi 01702

Because “RTGI” sounds similar to “RTK” (Real-Time Kinematic positioning in surveying) or “RTI” (Reverse Trade Intelligence), there is confusion. Let’s clear that up: Author: [Your Name/Institution] Date: April 12, 2026 The

If your property or project has been flagged with the code RTGI 01702, here is what you should do: The cache updates at variable rates: static surfaces

To ensure physical correctness, ERP resamples indirect contributions every 4 frames, correcting for energy loss due to caching and denoising. This prevents the common RTGI artifact of “darkening over time.”

A novel component of RTGI 01702 is its temporal cache that stores indirect irradiance in a clipmap of spherical harmonics (SH). The cache updates at variable rates: static surfaces every 16 frames, dynamic objects every 2 frames. This reduces ray casting overhead by ~70% in typical scenes.