I'm having trouble with the projection of one of my shapefiles (it's the roads network of the region I'm working on). I have a shapefile without any spatial reference information. When I use the define projection tool to assign it the same coordinate system as my other shapefiles it doesn't line up as it should.
That means it's not in the same coordinate system as your other shapefiles. You have a few options:
- Go back to the website or person where you got the shapefile from and ask/search for metadata.
- Trial and error: start assigning different coordinate systems until you find one that works. Since it's a road network, compare it to a basemap to figure out when the roads are in the right place.
- If all you need is a basic road network, you can probably download one with a properly defined coordinate system from open street maps or the regional government (in the US, try the state department of transportation).