I've got a polyline representing a pipeline and have a pig run that has metal loss. I am going to create a points shapefile in ArcMap 9.3.1 of the metal loss locations along the pipeline but want to do it like a sliding rule every 40 ft., giving me a count of the metal loss points per 40' section. What would be the best way to perform this task in arcmap? TIA!
Rusty, are you still working on this? Is your pipeline feature measured? What does the output from the pig run look like? The ideal way to do this would be to have the pipeline feature measured so you can create line events for the pipe conditions. You can probably put measures on your pipeline from the pig output, if the pipeline is not already measured, since you said you at least get coordinates from the pig output. You could use point events, but line events would probably be more appropriate.
If you are totally new to all this, look up linear referencing.
Take a look at the linked ArcGIS help pages on creating points along a line.
Using the editor toolbar in ArcGIS 10:
Using the "Divide" command in ArcGIS 9.3:
Points Along Polylines Wizard
The points are located on user specified relative distance from the start point of the polylines.
The user can specify an offset distance and on which side of the polylines the offset points will be created.
If "Both" option is selected for each polyline will be created 2 points (one on the left and one on the right side), otherwise one point per polyline will be created.