Mapping of Permanent Preservation Areas on Hilltops: Technical Issues

• Main Authors: Guilherme de Castro Oliveira, Elpidio Inacio Fernandes Filho, Márcio Rocha Francelino
• Format: Article
• Language: English
• Published: Universidade Federal Rural do Rio de Janeiro
• Series: Floresta e Ambiente
• Subjects: Law 12,651; forestry laws; new Forest Code; geographic information system
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-80872019000400128&lng=en&tlng=en

ABSTRACT Some technical issues that are inherent to the mapping of permanent preservation areas (PPAs) on hilltops in Brazil have not yet been properly regulated. This results in disparities in mapping an area depending on the technique used. This paper presents a case study that exposes the influence of the topographic database, mapping scale, and method of measuring the average slope on the results obtained. The total PPAs mapped on hilltops vary significantly as a result of these factors. Subjectivity in applying legislation leads to legal uncertainty, which can be resolved by establishing precise, complementary regulations on the issue. Accordingly, it is proposed that the method of measuring the mean slope and mapping scale should be defined by regulation.