English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Este estudo tem como objetivo avaliar a acuracia vertical dos Modelos Digitais de Elevacao (MDEs) SRTM v.3, ALOS World 3D e ASTER GDEM v.2 na regiao da denominacao de origem Vale dos Vinhedos, RS. Para tanto, os dados desses MDEs, com resolucao espacial de 30 m, foram comparados com os de um MDE fotogrametrico com resolucao espacial de 5 m no terreno, por meio de analises de regressao e correlacao linear, e de perfis topograficos derivados desses modelos. O Padrao de Exatidao Cartografica dos Produtos Cartograficos Digitais (PEC-PCD) de cada MDE foi analisado, para identificar a escala maxima de seu uso em estudos morfometricos, nas escalas 1:25.000, 1:50.000 e 1:100.000, por meio de calculos da Tolerância Vertical e do Erro Medio Quadratico (EMQ). Os MDEs SRTM v.3 e ASTER GDEM v.2 atenderam o PEC-PCD altimetrico classe A na escala 1:100.000. Diferentemente do MDE ALOS World 3D que enquadrou-se na classe B para a escala de 1:100.000. Todos os modelos, na escala 1:50.000, enquadraram-se na classe D, enquanto que na escala 1:25.000 nao houve enquadramento. O MDE SRTM v.3 foi o que apresentou melhores resultados morfometricos e o maior coeficiente de correlacao de Pearson (r=0,995). Todos os MDEs avaliados neste estudo apresentaram morfologia proxima a do MDE fotogrametrico. Portanto, recomenda-se o uso de todos os MDEs analisados em estudos morfometricos da area de estudo, sendo necessario observar o objetivo do trabalho, bem como a escala de analise e a apresentacao desses dados. Evaluation of the Vertical Acuracy of Digital Elevation Models SRTM, ALOS WORLD 3D and ASTER GDEM: a case study in Vale dos Vinhedos, RS - Brazil A B S T R A C T This work aims to evaluate the vertical accuracy of the digital elevation models (DEMs) SRTM v.3, Alos World 3D and ASTER GDEM v.2 in Vale dos Vinhedos designation of origin (DO) region, RS. Thus, the DEM data with 30 m of the spatial resolution were compared with photogrammetric DEM data with 5 m of the spatial resolution by linear regression and correlation analyzes, and also, topographic profiles carried out with these models. The Cartographic Accuracy Standard (PEC) of each DEM was analyzed to identify the maximum scale for morphometric application, in scales 1:25.000, 1:50.000 and 1:100.000, by calculations of Vertical Tolerance and the Mean Square Error (MSE). All DEMs. All the models studied were classified in class A for the 1:100,000 scale, and for the 1:50,000 scale the analyzed models were classified in class C, while in 1:25.000 scale doesn´t have application. The DEM SRTM v.3 presented smaller altimetry errors compared to ASTER GDEM and Alos World 3D, as for mophometric analysis and Pearson correlation coefficient (r=0,995). It is worth mentioning that all models analyzed are statistically and morphologically close. Therefore, they can be used to conduct several studies, however it is necessary to have in mind the goal of the work, and the scale of analysis and presentation. Keywords: Vertical accuracy, SRTM v.3, Alos World 3D, ASTER GDEM

Avaliação da Acurácia Vertical dos Modelos Digitais de Elevação SRTM, ALOS World 3D e ASTER GDEM: Um Estudo de Caso no Vale dos Vinhedos, RS – Brasil