This guide addresses the full spectrum of analytical techniques that are provided within modern Geographic Information Systems (GIS) and related geospatial software products. It is broad in its treatment of concepts and methods and representative in terms of the software that people actually use.

 The guide can be found here.

I had asked some of you if you knew of a way to transfer data from one centerline file to another. The reson for this request was that way back in 1996 I had manually attached two attributes (State ID and Segment #) to the first centerline file I got from Suffolk County. Now that the ALIS centerline file has come into existence I have been trying to figure out how to transfer the manually edited data over to the ALIS file. I started trying to do this in MapInfo but came up blank. Then we switched over to ArcMap. So it took me a while to get comfortable with ArcMap but now I have hopefully resolved my problem.

I used two tools:

Feature to Point (inside)

Near (200')

With the first tool I took both of my centerline files and made them into Point (polyline centroid) files. Then I used the Near tool to find all points from both of the centerline point files that were within 200' of each other. This left me with 10,000 hits out of 11,023. So now I have to manually check these in Access because I used a  geodatabase (which I only started using about a month ago) to do this. So I am quite happy with the tool set included in ArcInfo 9.2. I will be able to save myself a lot of time and greif.

Now I need to figure out how to get ArcMap to tell me what the intersecting line segments are for each line segment. My database has a "From street" and "To street" listed for each line segment .

After what just happened I am sure there is a tool to do this.