This initial effort is now being continuously upgraded by a dedicated engineering team with the ambition of fundamentally transforming GIS and how people use it. This new generation of our technology has been embraced by ....
Olá pessoal, Sem dúvidas que tutoriais existentes na internet, em diversos geoblogs e sites da área, salvam nosso dia ou nosso trabalho. Neste sentido, gostaria de compartilhar com vocês os tutoriais em pequenas animações do webhelp do ArcGIS (ESRI).
Processamento Digital de Imagens no ArcGIS Este tópico é um complemento para o seguinte artigo: ArcGIS 10: Mosaico de Imagens com Linha de Corte | 25/07/2012 Na época, eu demonstrei os passos para criação de um mosaico de duas imagens com linha de...
The NDVI (Normalized Difference Vegetation Index) tool in the Image Analysis Window calculates how vigorous the vegetation is in an area. But it’s not the only index available, although it may be the most widely used.
When indices have the same format as NDVI, which is to say (Band X – Band Y)/(Band X + Band Y) you can substitute any of the bands and the tool will still work. For example, to calculate the Normalized Difference Built-up Index (NDBI), select the near infrared and the shortwave infrared bands. For Landsat 7, band 4 is near infrared and band 5 is shortwave infrared. For Landsat 8, band 5 and 6 showed the most contrast (in a limited observation of Landsat 8 here at Redlands). Choose the appropriate bands and click the NDVI button, and your output will be the NDBI. NDBI is great for showing impervious surfaces and is really useful for detecting the growth of cities.
Geography in the News: Saving the Noble Chestnut NatGeo News Watch (blog) According to the Washington Post, the group is cultivating different trees in different states “to bring in the diversity that geography brings to a species.” Furthermore,...
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