A final contour comparison
Bottom line? LiDAR is the best, by so very far. Entire nation should be mapped in LiDAR. There, I said it.
Bottom line? LiDAR is the best, by so very far. Entire nation should be mapped in LiDAR. There, I said it.
Looking pretty good! Working on 1 m contours overnight. Using Global Mapper to make the contours, btw. The DEM I am using is from the LiDAR data shown in the preceding post.
Currently experimenting with the best way to make a final set of reliably smooth and faithful topographic contours for the Owyhee River geologic Map. First step is to smooth the 1-m dem. I used the spatial analyst\neighborhood\focal statistics function in Arc. Sounds weird, looks great. It was a tip from I. Madin at DOGAMI. Note: The data illustrated in the third figure were used to create the contours in the following post. The point was to smooth the landscape slightly to create a better looking contour set for the final map.
This reach of the river (looking downstream, btw) provides THE perspective on the role of lava flows in displacing the river and instigating massive slope failure.
Believe it or not, this one is almost done. I have posted proof of that before. What remains is the correct attribution of all of the lines that you see in red. I am systematically going through the map and fixing all of these. I started at the east end. Don't ask why so many lines are unattributed...long story.
Ok. So Google is apparently never going to upload the high-res NAIP
imagery of the Owyhee River study area. Here is a work-around. Draping
the LiDAR slopeshade image on the bad satellite imagery. Looks pretty damn good! Now we are very
proficient at doing this. On our way to developing some more elaborate
geologic projects in Google Earth. Should probably start with adding the hi-res imagery ourselves....
