Table 2 Description of LiDAR data and positional accuracy metrics for surveys conducted in Nova Scotia during the years 2019 and 2020.

From: Enhancing surface drainage mapping in eastern Canada with deep learning applied to LiDAR-derived elevation data

Specification

LiDAR dataset

2019 collection

2020 collection

Collection dates

May–October

July–September

Sensor

VQ1560i, Q780

VQ1560i, VQ1560ii

Sidelap

20%, 55%

20%

Average post spacing

6 ppsm

6 ppsm

Metric—NVA

Average difference (m): 0.005

Average difference (m): -0.022

RMSEz (m): 0.055

RMSEz (m): 0.057

NSSDA (m): 0.107

NSSDA (m): 0.112

Metric—VVA

Average difference (m): 0.078

Average difference (m): 0.008

RMSEz (m): 0.119

RMSEz (m): 0.046

NSSDA (m): 0.233

NSSDA (m): 0.091

  1. ppsm points per square meter, NVA non-vegetated vertical accuracy, VVA vegetated vertical accuracy, RMSEz vertical root mean square error, NSSDA national standard for spatial data accuracy.
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