2
votes
2answers
104 views

Problems with transformations in ArcMap

I have files projected in British National Grid. After I have transformed them into WGS_1984. I noticed that if I were to transform them back to BNG the original would not match the new. Is there a ...
2
votes
1answer
163 views

How to convert WGS84 to UTM when the study area covers two zones: UTM 51N and 52N

I want to use ArcMap to convert the WGS84 to UTM. But the study area covers two zones: UTM 51N and 52N. Which zone should I choose to output the result? 
2
votes
1answer
118 views

Wrong object size after projecting spatial data from one coordinate system to another

I am having problems reprojecting items in ArcMap 10.1 from British National Grid To WGS84. (WKID: 27700 Authority: EPSG to WKID: 102100 Authority: ESRI) All Polygon Layers I project [I use Project ...
6
votes
2answers
2k views

Measuring distance between points in ArcMap - what coordinate system to use?

This is a basic -newbie - question. I have some handwritten data points taken off a GPS - so I am assuming they are in WGS 84, and I want to load them in ArcMap 9.3, via excel, and measure the ...