Conventional geostatistical methodology solves the problem of predicting the realized value of a linear functional of a Gaussian spatial stochastic process S…x) based on observations Yi ˆ S…xi † ‡ Zi at sampling locations xi , where the Zi are mutually independent, zero-mean Gaussian random variables. We describe two spatial applications for which Gaussian distributional assumptions are clearly...

With the growing capabilities of Geographic Information Systems (GIS) and user-friendly software, statisticians today routinely encounter geographically referenced data containing observations from a large number of spatial locations and time points. Over the last decade, hierarchical spatiotemporal process models have become widely deployed statistical tools for researchers to better understan...

background and objectives: food security has been most important concern of the mankind on the earth. on the other hand, agricultural productions have always been face by risk probability in the case of weather and changes in international markets, however this risk probability never undeleted completely, but could be minimized that by pre-harvesting yield estimation. in this study, different m...

Precipitation is important factor affecting vegetation and controlling key ecological processes. In order to quantify spatial patterns of precipitation in Chongqing tobacco planting region, China, under ArcGIS platform, three multivariate geostatistical methods including cokriging, small grid and regression kriging, coupled with auxiliary topographic factors extracted from a 1:100000 DEM were a...

Many queries issued by users in sensor network (SN) applications select the sensor nodes for participation based on predicates involving spatio-temporal or sensed attributes. In this work we put forward the argument that considerable amount of energy can be saved if the processing and communication resulting from such queries can be restricted to the selected nodes. However, this requires disco...

First posted June 23, 2021 For additional information, contact: Geology, Energy & Minerals Science CenterU.S. Geological Survey12201 Sunrise Valley Drive, MS 954Reston, VA 20192Contact Pubs Warehouse The U.S. Survey (USGS) has been using its Circular 891 for evaluating uncertainty in coal resource assessments more than 35 years. Calculated cell tonnages are assigned to four qualitative reliabil...