This paper describes the methodology adopted to validate the planimetric and altimetric quality of a LIDAR survey hired by the city government of Porto Alegre, Brazil. The verifications were carried out by the crew of engineers of the city government, a hired company and professors of the Federal University of Rio Grande do Sul (UFRGS), using GPS sample points to verify the altimetry accuracy and photogrammetry to verify the planimetry accuracy. The results of the analysis presented a 7.5 cm altimetric precision, no sample points were reproved. The planimetric precision analysis presented an average error of 49.6 cm, with approval of more than 90% of the sample points.Pages: 6178-618
