<p><p><strong>References:<br></strong><em>Jumo and Geldenhuys (2004)<br>Landpac (2008a)</em></p><p><strong>Method Summary</strong></p><p>The CIR mapping procedure involves continuously recording the deceleration measurements (g’s) of the IR drum using accelerometer(s) instrumented in the drum, and mapping the results in an on-board computer using GPS. This technology is relatively new and proprietary. Limited literature is available on the applicability of this technology (Jumo and Geldenhuys 2004, and Landpac 2008a). Figure 1 shows a CIR deceleration map before (on the left side) and after 40 IR passes (on the right side) over a 20 hectare site from Landpac (2008a).</p><p><figure id='attachment_7329' style='max-width:1146px' class='caption aligncenter'><img class="wp-image-7329 size-full" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Color coded diagrams showing continuous impact response (CIR) values over a 20 hectare site. Left diagram shows the initial CIR condition and the right diagram shows the CIR condition after 40 passes." width="1146" height="456" /><figcaption class='caption-text'> Figure 1. Continuous Impact Response (CIR) deceleration data map during initial (left) and after 40 IR passes over a 20 hectare site (Landpac 2008a).</figcaption></figure></p><p><strong>Accuracy and Precision</strong></p><p>Accuracy and precision of this method has not been quantified in the literature. Detailed field testing results are required to make this assessment.</p><p><strong>Adequacy of Coverage</strong></p><p>Provides nearly 100% spatial coverage.</p><p><strong>Implementation Requirements </strong></p><p>The technology requires specialized equipment and proprietary software.</p><p><strong>General Comments</strong></p><p>This technique can be effectively used for QC process control. It has the potential for QA if site‑specific correlations can be developed through field trial test sections.</p></p>