Use of VGI from Non-Probability Samples
The use of Volunteered Geographic Information (VGI) and Crowdsourcing in Disaster Management: a Systematic Literature Review
... the use of VGI as a source of information to aid the management of ...of VGI and the way it can improve disaster ...the use of VGI in the research areas of ‘preparedness’ and ...
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Use of Automated Change Detection and VGI Sources for Identifying and Validating Urban Land Use Change
... Finally, all the binary change masks produced for each month are aggregated into monthly sums. To remove outliers and image artifacts, changes that occurred less than twice per month were removed from the mask. ...
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Using LASSO to Calibrate Non-probability Samples using Probability Samples.
... “calibrate” samples such that the weighted sample matches the population on key demographic statistics and internet-use, should always accompany propensity-score adjusted ...for probability and ...
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A simulation study of diagnostics for bias in non-probability samples
... CV(η) very closely resembles SMUB(0.5) and relatively closely aligns with the value of SEB, as exhibited by the segments’ close proximity to the y = x line. The SMUB indices, which are in the right-most three columns, ...
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Doubly Robust Inference when Combining Probability and Non-probability Samples with High-dimensional Data
... Abstract Non-probability samples become increasingly popular in survey statistics but may suffer from selection biases that limit the generalizability of results to the target pop- ...a ...
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VGI in Education from K-12 to Graduate Studies
... the VGI lecture is to register to OpenStreetMap and add several features using one of the web-based ...to use for the features they add ...using VGI in their project, namely that OpenStreetMap offers ...
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VGI quality control
... of VGI, which highlights different issues that need to be considered during the conception, acquisition and post- acquisition phases of VGI ...and use of control data, active quality control measures ...
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Challenges in VGI for scientific projects
... In this paper we want to address the challenges for using VGI within scientific projects. This paper is structured as follows: first we address the question how scientist can get users to be aware of their ...
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Motivating and Sustaining Participation in VGI
... images from different time periods and asked to look for evidence of change over time, ...the use of more reference data, where the images have been marked up to explain ...
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The Relevance of Protocols for VGI Collection
... first use the ...specific use: the first mode may be more suitable for LULC map creation; the second for LULC map validation; while the third can be either omitted or used for training after careful ...
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SPATIAL DATA UNCERTAINTY IN THE VGI WORLD: GOING FROM CONSUMER TO PRODUCER
... [Longley et al 2001] and, at the same time, alter and reduce its quality. Managing spatial data uncertainty requires the identification of the sources of uncer- tainty in order to better satisfy users’ requirements. In a ...
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Geographic-Aware Augmented Reality for VGI
... heavy use of area description files (ADF) of the environment that have to be collected in a preliminary off- line step in which the Tango device is used to scan the en- ...
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How To Use A Non-Negative Probability To Get A Better Result From A Probability Function
... of the Pseudo-marginal scheme. For example, Sherlock et al. (2013) established results on optimal scaling and acceptance rate, which indicate compromised efficiency when using the scheme. We close with the remark, that ...
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Comparing the Accuracy of RDD Telephone Surveys and Internet Surveys Conducted with. Probability and Non-Probability Samples
... Rui Wang Stanford University August, 2009 Jon Krosnick is University Fellow at Resources for the Future. The authors thank Norman Nie for making this research possible, Douglas Rivers for collaborating in the study ...
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Health Insurance Coverage and Physician Use Among Children With Disabilities: Findings From Probability Samples in Five Metropolitan Areas
... For both unin- sured and insured children, use was the lowest for those without a regular source of care (12% and 33%), average for those with a regular source but no regular physician ([r] ...
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Why Well Spread Probability Samples Are Balanced
... sampling from a finite population there is often auxiliary information available on unit ...that probability samples that are well spread in the auxiliary space are balanced, or approximately ...
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Integrating probability and nonprobability samples for survey inference
... of non- probability surveys ( Blom et ...several non- probability web survey data collections that were conducted in parallel with the GIP in March ...ordered from least expensive (pro ...
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Online Learning with Samples Drawn from Non-identical Distributions
... on samples which are often drawn independently from an identical distribution ...with samples drawn according to a non-identical sequence of probability ...drawn from a different ...
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Default probability estimation in small samples with an application to sovereign bonds
... we use the complete rating and default histories of sovereigns with public ratings from Standard & Poor’s in the period from January 1975 until April ...are from Standard & Poor’s (2011b) and ...
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Penalized Spline Model-Based Estimation of the Finite Populations Total from Probability-Proportional-to-Size Samples
... 5. Discussion Survey samplers are hesitant to use model-based prediction because of potential lack of robustness to modeling assumptions. However, prediction methods based on p-splines make relatively weak ...
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