AI-GEOSTATS: Methods for comparing trends in land cover change?
Greetings all, A questions from a newbie to spatial statistics: What if one is interested in the relationship between two areas, one which is a subset of another, i.e one has a 100 km2 rectangular area, and the area of interest is a 10 km2 area within that larger area, but also one is interested in the relationship between the part and the whole, i.e. if land cover changes in the part mimic larger trends in the whole. What methods are there for statistically comparing the two? Any thoughts are always appreciated, Best, David
AI-GEOSTATS: Question about choice of statistical procedures
Good evening to all, I am somewhat of a newbie to geostatistical analyses, but pretty familiar with GIS and remote sensing packages. I was wondering if anyone had suggestions on appropriate geostatistical analyses for a particular data set. The data set consists of a large-scale survey at the land plot level consisting of questions related to political participation (an ordinal scale), and raster data from a binary landcover classification of forest cover. The research question is whether political participation (potentially plus other variables) affects the presence of forest cover. What I´m imagining is some sort of multivariate linear regression in terms of the survey data, but when it comes to adding in the values from the raster I´m somewhat stymied. In doing some background research on potential approaches, it seems like looking at discrete variation might be the way to go. Any general advice would be greatly appreciated, p.s. I´m using ArcGIS 10 and Erdas 2011 Best to all, David + + To post a message to the list, send it to ai-geost...@jrc.ec.europa.eu + To unsubscribe, send email to majordomo@ jrc.ec.europa.eu with no subject and unsubscribe ai-geostats in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list + As a general service to list users, please remember to post a summary of any useful responses to your questions. + Support to the forum can be found at http://www.ai-geostats.org/
AI-GEOSTATS: Question re: calculating spatial GINI coefficient
Dear all, I am interested in calculating an index of agricultural land inequality for Brazil and have a question about best approaches. I'm thinking that a GINI coefficient would be a good approach given traditional uses of GINI, but am open to other suggestions. I have a data set for all municipalities in Brazil that consists of four columns for each municipality (rows): 1) number of family farms, 2) area occupied by small farm land use; 3) number of non-family farms; 4) area occupied by non-family farms. What's I'm really hoping to attain is a value that can represent the relations between percent area occupied by non-family farms in comparison with family farms. I can obtain the total area of the municipality from municipality shape file, but I don't think it makes sense to have a simple ratio of non-family farm area/municipality area as there will be various other forms of land use. Any suggestions on how to calculate a spatial GINI using this data set in ArcGIS (10.0), or a different statistic that makes more sense would be greatly appreciated Best, David -- Anthropology Department University of Alabama http://anthropology.ua.edu/name/David/Meek/
