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Expanding Access to LiDAR Through Compression - Feature Articles - Point of Beginning

Expanding Access to LiDAR Through Compression - Feature Articles - Point of Beginning | ArcGIS-Brasil | Scoop.it

What happens when a computer scientist with an uncanny knack for geometry compression takes an interest in LiDAR data? In the case of Martin Isenburg, a self-described “massive data processor and common sense extractor” based in Germany, the result is an award-winning open-source software solution that is making it easier for government agencies and organizations to store and transmit increasingly larger LiDAR data sets by compressing data from the ASPRS LAS format into much smaller LAZ files.

 

Developer of the LAStools software for processing LiDAR data, Isenburg worked extensively on compressing the connectivity and geometry of polygonal meshes--first as a student at UNC Chapel Hill, then as a postdoctoral researcher at UC Berkeley, and finally on his own as a consultant. When he introduced LASzip as part of LAStools in July 2007, it was mostly an experiment in his free time; he had no idea how the compression tool would be received in the commercial sector.

 

As word began to spread about LASzip, a number of government agencies and private organizations became interested in testing this technology. A sponsor soon stepped forward to fund improvements in the code and ensure that the tool would be released open source under an LGPL license. From there, “it sort of took off,” Isenburg said.

 

The LASzip compression is lossless, meaning that the LiDAR data is retained exactly: point coordinates, intensities, classification--even the order. The amount of compression that can be achieved on a single dataset therefore varies depending on the order of the points in the file--points in random order achieve much less compression than points that are still in the order in which they were acquired, which is typically the case. Files can often be compressed to as little as 7 to 25 percent of their original size. For LiDAR power users such as NOAA, the USGS, the Minnesota Department of Natural Resources and a number of private organizations, such a high level of compression saves on storage bandwidth. More importantly, the compression makes it easier to share datasets both internally and externally.

 

In April 2012, LAStools received a Technology Innovation Award at the Geospatial World Forum in Amsterdam for the LASzip compression tool. Popular commercial software packages such as Certainty 3D’s TopoDOT, Safe Software’s FME and Blue Marble Geographics’ Global Mapper already have native LAZ support. Isenburg said that QT Modeler and Fugroviewer are expected to follow in their next release, and that RIEGL, a major manufacturer of scanner hardware, plans to have RiProcess output directly to LAZ files.......


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6 apps in our new App Showcase you need to see

6 apps in our new App Showcase you need to see | ArcGIS-Brasil | Scoop.it
Sharing information through GIS-based Web apps is growing in popularity and the continuous release of out-of-the box tools is making it easier and easier to create them.
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Georreferenciamento ArcGis Arcmap - Basemap - Aula 02

Georreferenciamento de imagem com o Arcmap utilizando Basemap. Obs.: para melhorar a qualidade do vídeo utilize a ferramenta DETALHE que se encontra ...
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June Topographic and Imagery Basemap updates

June Topographic and Imagery Basemap updates | ArcGIS-Brasil | Scoop.it
New Canadian content has been added to both the Imagery and World Topographic Basemaps on ArcGIS Online. Find out which regions have been updated.
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Criar um Esri Personal Geodatabase e Importar Dados | Anderson Medeiros

Criar um Esri Personal Geodatabase e Importar Dados | Anderson Medeiros | ArcGIS-Brasil | Scoop.it
Neste tutorial explicamos desde como criar um Personal Geodatabase, visualizar sua estrutura e como inserir dados geográficos no banco gerado.
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Criar um Esri Personal Geodatabase e Importar Dados | Anderson Medeiros

Criar um Esri Personal Geodatabase e Importar Dados | Anderson Medeiros | ArcGIS-Brasil | Scoop.it
Neste tutorial explicamos desde como criar um Personal Geodatabase, visualizar sua estrutura e como inserir dados geográficos no banco gerado.
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Como Trabalhar com Diagrama de Voronoi no ArcGIS | Anderson Medeiros

Como Trabalhar com Diagrama de Voronoi no ArcGIS | Anderson Medeiros | ArcGIS-Brasil | Scoop.it
O diagrama de Voronoi, também conhecido pela denominação de polígonos de Thiessen são utilizados para resolver problemas que envolvem conceito de proximidade em
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Apostila: Introdução ao Geoprocessamento com ArcGIS | Anderson Medeiros

Apostila: Introdução ao Geoprocessamento com ArcGIS | Anderson Medeiros | ArcGIS-Brasil | Scoop.it
A apostila foi elaborada para treinamento de colaboradores da Embrapa Solos, e também de seus parceiros, em ferramentas de SIG, utilizando o programa ArcGIS. O
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ArcGIS: Como Recortar Dados Raster a partir de Polígono de Interesse | Anderson Medeiros

ArcGIS: Como Recortar Dados Raster a partir de Polígono de Interesse | Anderson Medeiros | ArcGIS-Brasil | Scoop.it
Neste tutorial aprenderemos como usar o ArcGIS para recortar imagens a partir shapes. Faremos uso de uma das ferramentas do ArcToolBox.
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Apostila: Iniciando no ArcGIS

Apostila: Iniciando no ArcGIS | ArcGIS-Brasil | Scoop.it
Na internet há muito material de qualidade, em vários idiomas, sobre o ArcGIS. Indicamos aqui uma excelente apostila gratuita, elaborada de forma a ajudar o usuário iniciante a dar seus primeiros p...
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Mapping the Future with Big Data | World Future Society

Mapping the Future with Big Data | World Future Society | ArcGIS-Brasil | Scoop.it

Esri offers a “Facebook for Maps” that promises to change the way we interact with our environment, predict behavior, and make decisions in the decades ahead.


Via Alexandre Marques de Aguiar, Richard Dalaqua
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Mapping the Future with Big Data | World Future Society

Mapping the Future with Big Data | World Future Society | ArcGIS-Brasil | Scoop.it

Esri offers a “Facebook for Maps” that promises to change the way we interact with our environment, predict behavior, and make decisions in the decades ahead.


Via Alexandre Marques de Aguiar
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Primeiros Passos com a ArcGIS JavaScript API

Primeiros Passos com a ArcGIS JavaScript API | ArcGIS-Brasil | Scoop.it

No dia 05/09 às 15:00 horas, Roberto Pepato, Engenheiro de Software GIS, vai apresentar como utilizar a ArcGIS JavaScript API para criar geoaplicações, de forma simples e com pouco esforço de codificação. 

Junte-se a nós nesta sessão de live coding para aprender os fundamentos da ArcGIS JavaScript API e saiba como construir suas primeiras aplicações!


Via André Gavlak
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Adicionar Fotografias no ArcGIS - GeoTagged Photos to Points

ArcGIS Angola, 1ª Video Aula - (Demo) - Como adicionar uma foto do GPS, Camera ou SmarthPhone com GPS ativo no ArcGIS e realizar o mapeamento da sua ...
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Georreferenciamento ArcGis Google Earth Pro - Aula 01

Georreferenciando imagem do Google Earth Pro utilizando o ArcGis 10.1 (Arcmap). Obs.: para melhorar a qualidade do vídeo utilize a ferramenta DETALHE ...
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December Updates to the World Topographic Map

December Updates to the World Topographic Map | ArcGIS-Brasil | Scoop.it
The World Topographic Map was updated this week with new content and a new design for 1:144 k, 1:72 k and 1:36 k scales.
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March Updates to the ArcGIS Online Basemaps

March Updates to the ArcGIS Online Basemaps | ArcGIS-Brasil | Scoop.it
Some updates to the imagery and world topographic basemaps on ArcGIS Online
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Explorer for ArcGIS agora disponível em versão Android | MundoGEO

Explorer for ArcGIS agora disponível em versão Android | MundoGEO | ArcGIS-Brasil | Scoop.it
Projetado para qualquer um que precise explorar dados em um contexto geo- gráfico, o Explorer for ArcGIS permite descobrir e...
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Some tips on capturing ArcSDE error logs to diagose issues | Esri Canada

Some tips on capturing ArcSDE error logs to diagose issues | Esri Canada | ArcGIS-Brasil | Scoop.it
Some tips on capturing ArcSDE error logs to diagose issues http://t.co/WazAqI99Yl via @EsriCanada
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Livro Gratuito: ArcGIS no Processamento de Imagens Orbitais | Anderson Medeiros

Livro Gratuito: ArcGIS no Processamento de Imagens Orbitais | Anderson Medeiros | ArcGIS-Brasil | Scoop.it
Neste artigo iremos indicar um excelente e-book gratuito sobre Processamento de Imagens Orbitais no ArcGIS.

Via geoinformacao
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Como fazer o Download Gratuito e Instalar o ArcGIS

Como fazer o Download Gratuito e Instalar o ArcGIS | ArcGIS-Brasil | Scoop.it
Como baixar o ArcGIS gratuitamente e validar a instalação? Neste tutorial queremos propor um guia completo sobre como fazer o download, instalação e ativação do ArcGIS 10.2. Logicamente, estamos no...
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Técnicas de Classificação de Imagens ArcGIS - YouTube

As principais técnicas de classificação de imagens supervisionada e não supervisionada através do ArcGIS.

Via Alexandre Marques de Aguiar
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Plug-in para ArcGIS: Landsat 8 Image Service Add-In Tools

Plug-in para ArcGIS: Landsat 8 Image Service Add-In Tools | ArcGIS-Brasil | Scoop.it

Add-In for ArcGIS Desktop 10.2.1 or 10.2.2 - to add and analyze Esri's Landsat 8 image serviceClick here to edit the title


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E-books Gratuitos da Esri sobre GIS

E-books Gratuitos da Esri sobre GIS | ArcGIS-Brasil | Scoop.it
A Esri está distribuindo para download gratuito uma série de livros digitais gratuitos sobre tópicos diversos que vão desde conceitos básicos em SIG até as diversas aplicações do sistema ArcGIS par...
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