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Confidence-rich grid mapping

Ali-akbar Agha-mohammadi, Eric Heiden, Karol Hausman, Gaurav Sukhatme
2019 The international journal of robotics research  
In this work, we present confidence-rich mapping (CRM), a new algorithm for spatial grid-based mapping of the 3D environment. CRM augments the occupancy level at each voxel by its confidence value.  ...  By explicitly storing and evolving confidence values using the CRM filter, CRM extends traditional grid mapping in three ways: first, it partially maintains the probabilistic dependence among voxels.  ...  Here, we provide a more detailed theoretical derivation of the confidence-rich grid mapping approach.  ... 
doi:10.1177/0278364919839762 fatcat:js5sq7j6yjfefowlbqmdbdlqde

The performance of range maps and species distribution models representing the geographic variation of species richness at different resolutions

Eduardo Pineda, Jorge M. Lobo
2012 Global Ecology and Biogeography  
Results MaxEnt predictions reveal greater geographic differences in richness between species rich and species poor regions than the range maps did at the five resolutions assessed.  ...  We compared the performance of range maps and MaxEnt species distribution models at different spatial resolutions by examining the degree of similarity between predicted species richness and composition  ...  The species richness values obtained from range maps and SDMs were correlated (using the Spearman rank correlation coefficient) with observed richness values for the grid cells identified as well surveyed  ... 
doi:10.1111/j.1466-8238.2011.00741.x fatcat:4y7uifsnubdvvkyjmchk64gblq

Hotspots and conservation gaps: A case study of key higher plant species from Northwest Yunnan, China

Peng-cheng Ye, Guang-fu Zhang, Jian-yong Wu
2020 Global Ecology and Conservation  
Next, we obtained and superimposed the longitude and latitude coordinates of each species' location on a grid map with a 0.05° × 0.05° resolution.  ...  Northwest Yunnan is rich in flora and is home to many key higher plant species with endemic and endangered attributes.  ...  Hotspots distribution for KHPs in Northwest Yunnan Hotspots calculated by species richness in the grid With respect to the overall assessment, 90%, 95%, and 99% of the confidence grids accounted for  ... 
doi:10.1016/j.gecco.2020.e01005 fatcat:kpr4h6hlnnckto6bpeozb5azz4

Richness and large-scale distribution of marine benthic caridean shrimps (Decapoda: Caridea) from the Eastern Tropical Pacific

Betel Martínez-Guerrero, Andrés López-Pérez
2018 Nauplius  
Most species (24%) have a narrow distribution inhabiting a single grid, and as many as 135 are restricted to < 5 grids. Mexico has the largest richness (130) besides Ecuador (98) and Panama (75).  ...  Richness among grids varies largely; overall, it is larger around Galapagos and Panama, Colombia, Costa Rica and the Gulf of California.  ...  According to species mapping, richness varies largely among grids in the ETP (Fig. 3) .  ... 
doi:10.1590/2358-2936e2018035 fatcat:hg75nf6ubral7chglc4o7hvpam

A comparison of methods for mapping species ranges and species richness

Catherine H. Graham, Robert J. Hijmans
2006 Global Ecology and Biogeography  
At all resolutions, point-to-grid richness maps estimated the lowest species richness and those derived from species distribution models the highest.  ...  The methods we used to create ranges included: point-to-grid maps, obtained by overlaying point observations of species occurrences with a grid and determining presence or absence for each cell; expert-drawn  ...  Compared to point-to-grid richness maps, richness maps derived from expertdrawn range maps are more likely to overestimate local richness ('error of commission'), because they are generally drawn to include  ... 
doi:10.1111/j.1466-8238.2006.00257.x fatcat:kzpf3qoksvdrvhc677rt3n22qe

A comparison of methods for mapping species ranges and species richness

Catherine H. Graham, Robert J. Hijmans
2006 Global Ecology and Biogeography  
At all resolutions, point-to-grid richness maps estimated the lowest species richness and those derived from species distribution models the highest.  ...  The methods we used to create ranges included: point-to-grid maps, obtained by overlaying point observations of species occurrences with a grid and determining presence or absence for each cell; expert-drawn  ...  Compared to point-to-grid richness maps, richness maps derived from expertdrawn range maps are more likely to overestimate local richness ('error of commission'), because they are generally drawn to include  ... 
doi:10.1111/j.1466-822x.2006.00257.x fatcat:25qtccm7vreujpydtozydd2p2y

Extended methods and supplementary figures from Poor geographical match between the distributions of host diversity and parasite discovery effort

Fátima Jorge, Robert Poulin
2018 Figshare  
We test the expected spatial congruence between host and parasite diversity for helminth parasites of vertebrate hosts, across grid cells of a global map.  ...  The host taxon-specific maps we produced, however, can guide future efforts to uncover parasite biodiversity.  ...  To generate global maps of both parasite discoveries and host species richness, species' geographic distribution data were transformed into two presence-absence matrices, one with a global grid of 1º of  ... 
doi:10.6084/m9.figshare.6247490 fatcat:txwabsil5ngvvkemycwflua2qe

Plant Species Richness Pattern across India's Longest Longitudinal Extent

Mukunda Dev Behera, Partha Sarathi Roy, Rajendra Mohan Panda
2016 Current Science  
western to eastern grid.  ...  The major predictor of species richness was the number of forest vegetation types, followed by topography (ruggedness index); together these explained 63% of the variance as revealed from generalized linear  ...  x x Table 3 . 3 Coefficient and confidence intervals at 95% confidence level for selected predictor variables under Poisson error distribution model.  ... 
doi:10.18520/cs/v111/i7/1220-1225 fatcat:cjgjhm3675e2zhv5bfwghb4lna

Conservation Action Based on Threatened Species Capture Taxonomic and Phylogenetic Richness in Breeding and Wintering Populations of Central Asian Birds

Manuel Schweizer, Raffael Ayé, Roman Kashkarov, Tobias Roth, Valerio Ketmaier
2014 PLoS ONE  
According to the distribution maps, the average (mean 6 SD) taxonomic richness in the 267 grid cells that contained the centres of the IBAs was 104.1636.9 breeding bird species and 58.8630.6 wintering  ...  To allow a better understanding of why the effectiveness of IBAs differed between the measures of diversity, we produced maps for the distribution of the 10% of grid cells with the highest taxonomic richness  ... 
doi:10.1371/journal.pone.0110511 pmid:25337861 pmcid:PMC4206344 fatcat:waedlccinjchfadnuozkir6iyq

Testing the Efficacy of Global Biodiversity Hotspots for Insect Conservation: The Case of South African Katydids

Corinna S. Bazelet, Aileen C. Thompson, Piotr Naskrecki, Robert Guralnick
2016 PLoS ONE  
Using a 1°fishnet grid, we delineated katydid hotspots in two ways: (1) count-based: grid cells in the top 10% of total, endemic, threatened and/or sensitive species richness; vs. (2) score-based: grid  ...  Species richness was the least successful surrogate of all.  ...  The sample-based SAC had no overlap in confidence intervals, indicating that any differences in species richness between hotspot and non-hotspot grid cells was indicative of an ecological difference and  ... 
doi:10.1371/journal.pone.0160630 pmid:27631131 pmcid:PMC5025148 fatcat:zqq5t57j75frppdkih3fabyc5q

Urban aliens and threatened near-naturals: Land-cover affects the species richness of alien- and threatened species in an urban-rural setting

Tanja K. Petersen, James D. M. Speed, Vidar Grøtan, Gunnar Austrheim
2020 Scientific Reports  
The habitat categories were based on detailed land-cover maps.  ...  Spatially correlated Generalised Linear Mixed Effects Models predicting the number of all-, threatened-and alien species by taxon, habitat, habitat heterogeneity and mean aspect within 500 m×500 m grid  ...  The map was overlaid by a 500 m × 500 m grid.  ... 
doi:10.1038/s41598-020-65459-2 pmid:32444662 fatcat:beduau5c5ve6dootb2sd4kybtu

Climate Change, Habitat Loss, Protected Areas and the Climate Adaptation Potential of Species in Mediterranean Ecosystems Worldwide

Kirk R. Klausmeyer, M. Rebecca Shaw, Jon Moen
2009 PLoS ONE  
High conversion and low protection in projected stable areas make Australia the highest priority region for investment in climate-adaptation strategies to reduce the threat of climate change to the rich  ...  By overlaying all of the future MCE projections, we were able to map all of the grid cells on the globe where the MCE is likely to expand, contract, and remain stable with varying levels of confidence  ...  [2] , preliminary analysis indicates significant overlap between the current MCE and the mapped hotspots of plant richness and endemism within the mediterranean biome.  ... 
doi:10.1371/journal.pone.0006392 pmid:19641600 pmcid:PMC2712077 fatcat:exocaj5ovjab5nnyzfxkjvzxjm

Beauplan's Ukraine: open access georeferenced databases for studies of early modern history of Central and Eastern Europe

Michael Polczynski, Mark Polczynski
2019 Miscellanea Geographica: Regional Studies on Development  
provided by Beauplan's maps into a viable instrument for the laboratory of the historian of south-eastern Europe in Early Modern times.  ...  The purpose of this document is to describe how these databases and related materials can be accessed and applied by scholars, with the ultimate goal of this work being to convert the rich source of information  ...  Beauplan's maps typically include latitude and longitude markers along the edges of the map; and a map grid is created for a particular map by drawing grid lines between these markers.  ... 
doi:10.2478/mgrsd-2019-0015 fatcat:vedc4ndxkjavdokxh5tddjo3ga

Future effects of climate and land-use change on terrestrial vertebrate community diversity under different scenarios

Tim Newbold
2018 Proceedings of the Royal Society of London. Biological Sciences  
I thank Richard Pearson for detailed and very helpful comments on a draft of the manuscript, and Henry Ferguson-Gow for invaluable advice on computing and mapping.  ...  this species richness as a percentage of the value for the same grid cell in the reference time period .  ...  I resampled all of the distribution maps and climate data onto a 10 kmÂ10 km equal-area grid, which was used for the fitting of all distribution models.  ... 
doi:10.1098/rspb.2018.0792 pmid:29925617 pmcid:PMC6030534 fatcat:avp7ilqvr5c2tpjk2xj5mcjoje

Global patterns and predictors of marine biodiversity across taxa

Derek P. Tittensor, Camilo Mora, Walter Jetz, Heike K. Lotze, Daniel Ricard, Edward Vanden Berghe, Boris Worm
2010 Nature  
Both sources used 5u cells that we combined, converted to ranges, and mapped to the 880-km grid.  ...  For each group, we mapped the global distribution of species richness and assessed the extent to which it covaried across taxa.  ... 
doi:10.1038/nature09329 pmid:20668450 fatcat:i4gxs6pjmvestbsjwvmc4rwe4a
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