Decifrando uma carta !
Autor: Moaci Judson | Publicado: 2011-06-28T00:57:00-03:00

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- O lado de cima da carta e por convenção sempre o Norte.
- O nome da carta e encontrada sempre na extremidade de cima da carta, o seu nome e extraído de uma cidade ou algum acidente geográfico importante da região.
- E uma grade na parte inferior com nove retângulos encontramos o nome da carta (ao centro) e os nomes das cartas adjacentes.
- Na parte inferior encontramos um desenho do estado com a localização da carta, para uma rápida consulta.
- Nos cantos da carta estão descritos as Longitudes e Latitudes.
- No rodapé da carta, encontramos a escala da carta, nas formas numerais e gráficas.
- Também no rodapé encontramos a equidistância das curvas de nível ou seja o desnível entre as curvas que geralmente são de 20 metros nas cartas de 1/50.000 e 40 nas cartas de 1/100.000.
- Encontramos também a direção do Norte verdadeiro ou geográfico, bem como o Norte magnético , e a declinação magnética com o ano que serve de base , e sua variação anual. Encontramos também o Norte da quadricula.
- E por final e não menos importante uma tabela de convenção com todos os símbolos e cores utilizados na carta.
Adaptado do Livro de Orientação do Excursionista Perdido do Sérgio Beck.PS. Comprem ele, vale muito a pena!