检索结果-南通市图书馆

Advancing Digital Earth:beyond the next generation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2014年第1期7卷 3-16页

作者： Manfred Ehlers peter woodgate Alessandro Annoni Sven Schade Institute for Geoinformatics and Remote Sensing University of Osnabru˝ckOsnabru˝ckGermany Cooperative Research Centre for Spatial Information Australia and New ZealandMelbourneAustralia Joint Research Centre European CommissionIspraItaly European Environment Agency CopenhagenDenmark

The Digital Earth(DE)movement is gaining *** of it is *** paper examines a number of recent developments including those in health sensors(Wearable Absence,Q-Sensor,and Guardian Angels)and systems frameworks(Gelernter’s Mirror Worlds,Virtual Australia,and New Zealand).Consideration is given to the implications of DE for citizens and on citizen science,including those of ethics.A suite of principles to guide the development of DE is proposed.

关键词： Digital Earth vision virtual spatial science Geomatics social science ethics

The Australian approach to geospatial capabilities;positioning,earth observation,infrastructure and analytics:issues,trends and perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 2017年第2期20卷 109-125页

作者： peter woodgate Isabel Coppa Suelynn Choy Stuart Phinn Lesley Arnold Matt Duckham Australia and New Zealand Cooperative Research Centre for Spatial Information MelbourneAustralia School of Science RMIT UniversityMelbourneAustralia Remote Sensing Research Centre University of QueenslandBrisbaneAustralia Australia and New Zealand Cooperative Research Centre for Spatial Information PerthAustralia

This paper examines the current state of three of the key areas of geospatial science in Australia:positioning;earth observation(EO);and spatial *** paper discusses the limitations and challenges that will shape the development of these three areas of geospatial science over the next decade and then profiles what each may look like in about ***’s national positioning infrastructure plan is guiding the development of a nation-wide,sub decimeter,real-time,outdoor positioning capability based on multi-GNSS and in particular the emerging precise point positioning−real-time kinematic(PPP-RTK)*** positioning systems including the ground-based Locata system,location-based indoor systems,and beacons,among others are also *** importance of the underpinning role of a next generation dynamic datum is *** development of Australia’s first EO strategy is described along with the key national needs of the products of remote *** development of massive on-line multi-decadal geospatial imagery data stores and processing engines for co-registered stacks of continuous base-line satellite imagery are ***,perspectives on the evolution of a future spatial knowledge infrastructure(SKI)emerging from today’s traditional spatial data infrastructures(SDIs)are provided together with discussion of the growing importance of geospatial analytics for transforming whole supply chains.

关键词： Australia geospatial Information positioning earth observation remote sensing spatial knowledge infrastructure(SKI) trends enablers

Predicting Levels of Crude Protein, Digestibility, Lignin and Cellulose in Temperate Pastures Using Hyperspectral Image Data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2014年第7期5卷 997-1019页

作者： Susanne Thulin Michael J. Hill Alex Held Simon Jones peter woodgate AusCover CSIRO Marine and Atmospheric Research Canberra Australia Cooperative Research Centre for Spatial Information Carlton Australia Department of Earth System Science and Policy University of North Dakota Grand Forks USA Department of Geospatial Sciences RMIT Univer-sity Melbourne Australia Department of Geospatial Sciences RMIT University Melbourne Australia Brockmann-Geomatics Sweden AB Kista Sweden

Hyperspectral sensors provide the potential for direct estimation of pasture feed quality attributes. However, remote sensing retrieval of digestibility and fibre (lignin and cellulose) content of vegetation has proven to be challenging since tissue optical properties may not be propagated to the canopy level in mixed cover types. In this study, partial least squares regression on spectra from HyMap and Hyperion imagery were used to construct predictive models for estimation of crude protein, digestibility, lignin and cellulose concentration in temperate pastures. HyMap and Hyperion imagery and field spectra were collected over four pasture sites in southern Victoria, Australia. Co-incident field samples were analyzed with wet chemistry methods for crude protein, lignin and cellulose concentration, and digestibility was calculated from fiber determinations. Spectral data were subset based on sites and time of year of collection. Reflectance spectra were extracted from the hyperspectral imagery and collated for analysis. Six different transformations including derivatives and continuum removal were applied to the spectra to enhance absorption features sensitive to the quality attributes. The transformed reflectance spectra were then subjected to partial least squares regression, with full cross-validation “leave-one-out” technique, against the quality attributes to assess effects of the spectral transformations and post-atmospheric smoothing techniques to construct predictive models. Model performance between spectrometers, subsets and attributes were assessed using a coefficient of variation (CV), —the interquantile (IQ) range of the attribute values divided by the root mean square error of prediction (RMSEP) from the models. The predictive models with the highest CVs were obtained for digestibility for all spectra types, with HyMap the highest. However, models with slightly lower CVs were obtained for crude protein, lignin and cellulose. The spectral regions for di

关键词： Pasture Quality Crude Protein Digestibility Lignin Cellulose Hyperspectral Remote Sensing Partial-Least Squares Regression

Digital Earth 2020:towards the vision for the next decade

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2012年第1期5卷 4-21页

作者： Max Craglia Kees de Bie Davina Jackson Martino Pesaresi Gabor Remetey-Fulopp Changlin Wang Alessandro Annoni Ling Bian Fred Campbell Manfred Ehlers John van Genderen Michael Goodchild Huadong Guo Anthony Lewis Richard Simpson Andrew Skidmore peter woodgate European Commission Joint Research Centre IspraItaly ITC University of TwenteEnschedeThe Netherlands D_Citynetwork SydneyAustralia Hungarian Association for Geo-Information(HUNAGI) BudapestHungary Center for Earth Observation and Digital Earth Chinese Academy of SciencesBeijingChina Department of Geography University at BuffaloState University of New YorkBuffaloNYUSA Canada Centre for Remote Sensing OttawaONCanada Institute for Geoinformatics and Remote Sensing University of OsnabruckOsnabruckGermany Department of Geography Center for Spatial StudiesUniversity of CaliforniaSanta BarbaraCAUSA Department of Geography and Anthropology Louisiana State UniversityBaton RougeLAUSA Nextspace AucklandNew Zealand Cooperative Research Center for Spatial Information Australia and New Zealand Land Information CouncilCanberraAustralia

This position paper is the outcome of a brainstorming workshop organised by the International Society for Digital Earth(ISDE)in Beijing in March *** argues that the vision of Digital Earth(DE)put forward by Vice-President Al Gore 13 years ago needs to be re-evaluated in the light of the many developments in the fields of information technology,data infrastructures and earth observation that have taken place *** paper identifies the main policy,scientific and societal drivers for the development of DE and illustrates the multi-faceted nature of a new vision of DE grounding it with a few examples of potential *** no single organisation can on its own develop all the aspects of DE,it is essential to develop a series of collaborations at the global level to turn the vision outlined in this paper into reality.

关键词： Digital Earth spatial data infrastructures earth observation GEOSS geobrowsers voluntary geographic information