search for: wsg84

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2006 Mar 21
3
transform shapefiles in UTM to lat/long
Dear all: I have a shapefile in UTM coordinate system and I would like to transform it to Lat/Log coordinates (WSG84). The package PBSmapping contains function convUL to transform between the two coordinate systems when data is in the form of a data frame with attributes specifying the coordinate system. However, when shapefiles are imported using function read.shape (package maptools), a list instead of a data...
2009 Jan 10
1
Bubble plot on shapefile - projection issues?
...erarchical, Highresolution Shoreline) but the map data is not of high enough resolution.? Instead I am trying to plot the data on a shapefile, but I can't find out how to project the shapefile correctly to match up with the data.? I know my shapefile is in NAD 1983 UTM Zone 4N and my data is in WSG84.? How do I change the projections to make them line up?? I tried mapproj but couldn't get it to work.? Any suggestions would be greatly appreciated.? ? My code is below.? I have also attached the shapefile and my data. ? Thanks in advance for your help. ? Aloha, ? Tim ? ? ? ? #Read ESRI shapefi...