GPR technical guides
Guides written for the people who collect and interpret GPR data. No sales talk: what you need to know, with the numbers.
How to interpret GPR radargrams for utility detection
Hyperbolas, ground velocity, depth, utilities crossed at an angle, noise and attenuation: a step-by-step method for reading GPR radargrams on utility surveys.
GPR utility survey accuracy: depth, uncertainty, PAS 128 and ASCE 38
What GPR really measures, where the uncertainty comes from, and how to back up the accuracy you report under PAS 128 in the UK and ASCE 38 quality levels in the US.
From GPR DZT files to a CAD plan: formats, coordinates and deliverables
GSSI DZT, DZG and DZX files, GNSS positioning, British National Grid with OSTN15, NAD83(2011) / UTM, and DXF, CSV and GeoJSON deliverables: the full path from GPR survey to plan.
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