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		<issn>2179-4820</issn>
		<citationkey>PinheiroEspe:2017:OnToVi</citationkey>
		<title>VisGL: an online tool for visualization of bivariate georeferenced data</title>
		<format>Pendrive, On-line.</format>
		<year>2017</year>
		<secondarytype>PRE CN</secondarytype>
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		<author>Pinheiro, Tarsus Magnus,</author>
		<author>Esperança, Claudio,</author>
		<affiliation>Universidade Federal do Rio de Janeiro (UFRJ)</affiliation>
		<affiliation>Universidade Federal do Rio de Janeiro (UFRJ)</affiliation>
		<editor>Davis Jr., Clodoveu A. (UFMG),</editor>
		<editor>Queiroz, Gilberto R. de (INPE),</editor>
		<e-mailaddress>lubia@dpi.inpe.br</e-mailaddress>
		<conferencename>Simpósio Brasileiro de Geoinformática, 18 (GEOINFO)</conferencename>
		<conferencelocation>Salvador</conferencelocation>
		<date>04-06 dez. 2017</date>
		<publisher>Instituto Nacional de Pesquisas Espaciais (INPE)</publisher>
		<publisheraddress>São José dos Campos</publisheraddress>
		<pages>62-73</pages>
		<booktitle>Anais</booktitle>
		<tertiarytype>Full papers</tertiarytype>
		<transferableflag>1</transferableflag>
		<abstract>This paper describes an online interactive thematic map for simul- taneously visualizing two scalar variables and which supports filtering, config- urable category classes, as well as panning and zooming in levels of detail. The user experience is improved by means of queries posed through manipulation tools that produce instant responses at screen. This is possible through the high rendering rates get by the system, that uses GPU programming to assemble and manipulate previously rasterized tiles with location information recorded in the color space of pixels. This procedure allows the implementation of interactive animated actions and spatial data decomposition.</abstract>
		<area>SRE</area>
		<language>pt</language>
		<targetfile>7pinheiro_esperanca.pdf</targetfile>
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