Georeferencing workshop

I georeferenced a street map of LSU to a raster screen shot mosaicked in Photoshop. I got RMS down to 1.8. Very nice map.

Very good presentation, learned a lot. It's possible to use building layer as well as street layer to georeference. Now I know what I was missing by relying on the ArcMap help screens.

Monday morning in Baton Rouge

Drove through the fog this morning to attend a georectification workshop preliminary to the LARSGIS conference this week. Waiting for latecomers to arrive. Hope to gain mental illumination on the topics I've been struggling with this semester for my class project using historic maps.

Maps Galore

Jim brought by the external hard drive that he copied 90 area maps from DEQ. I can't wait to have time to look them over.

New Stuff!

I got some new tiffs today from Joe Holmes at DEQ - they are georeferenced historic 15 minute quads in my study area. They are referenced to NAD83. I haven't tried to create my feature layers yet with them, but I downloaded, unzipped and looked at them in ArcMap. I am regaining hope for the project. Meanwhile, during lab yesterday, I downloaded some modern maps that I was going to try to create polygon layers showing the shoreline changes and sandbar development.

I'm going to go forward with the maps Joe sent me. My cohort in crime, Jim Delahoussaye, will go to Joe's office tomorrow with an external hard drive to copy all the historic maps that Joe has on the Atchafalaya Basin area.

Answers on the Horizon

I met John Snead, Cartographic Manager at the Louisiana Geological Survey at the cochon de lait we attended today. I mentioned my problems with the 15 minute historic quads, and he told me that the answer lies in the properties of the projection. Specifically, the meridian, lat/lon and other properties. I need my projection to match.

He suggested that there may be metadata available on the maps, which would be contain the information I'm looking for.

I'm going to e-mail Joe Holmes at DEQ to see if metadata exists on these maps.

All Set for Rectifying Rasters Pre-Conf Session

I have signed up for the pre-conference session on rectifying rasters. It is only a morning session, but I hope to at least find out why my 15-minute quads won't work.

GIS Woes Continue

This is not an April Fools joke - I have to figure out how to complete the project without my favorite maps. Time's a-wastin'. I also need to finish all the reading to find the locations for my features.

Why do the 7.5 minute old maps georeference fine, but not the 15-minute ones? Still reading up on ESRI web site support and knowledgebase as much as time allows; haven't found answer. Bryan, the lab instructor, has my files and is giving it a try.

Looking forward to the Remote Sensing and GIS workshop in Baton Rouge the week after Easter.