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Discussion: sucky aerial process

in: cedarcreek; cedarcreek > 2016-05-11

May 15, 2016 12:58 PM # 
David_Waller:
I hear you. Are you getting photos from Pictometry Online meanwhile? They have good photos, but the retrieval process for a big swathe can be hit-or-miss. Seems like it would be easy enough for them to add a function to download all photos in a specified area.

By the way, I'm bringing a homemade doppelbock up to Grant park for you this morning. Hope to see you there.
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May 16, 2016 4:56 AM # 
cedarcreek:
No, I'm talking about the Indiana GIS process. I have to be missing something.

I definitely need to give Pictometry a try.

Hope to see you Monday at the OCIN meeting.
May 16, 2016 4:57 AM # 
cedarcreek:
No, I'm talking about the Indiana GIS process. I have to be missing something.

I definitely need to give Pictometry a try.

Hope to see you Monday at the OCIN meeting.
May 23, 2016 6:01 PM # 
cedarcreek:
It looks like the USGS EarthExplorer site, which often has NC lidar, has the 2011 Indiana Aerials, which are available on the Indiana GIS site, but with a slighty less wonky download interface. (For example, I can't get the bulk download application to run properly, but if you download all the hits, you can usually get the area you need without holes.)

Go here:
http://earthexplorer.usgs.gov/

Zoom to about where you want---one click too far in is best.

On the left, click, "Use Map" (or something like that). The screen with turn red. Now zoom out until the four corners appear. Adjust them to your area of interest.

Now click "Data Sets" and Select "Aerial Imagery" and then check the box for "High Resolution Orthoimagery" to get the 2011 Indiana aerials.

Now click "Results" to get the list of images. You have to figure out the download interface. I always make sure I get at least one metadata file so you can verify projection and other details. When I'm looking for other aerial photo options, like the approximately annual agricultural set (lower res, but good for new details you can get any other way) or the old old black and white DOQs, you check a bunch of boxes in "Data Sets", but then you have to pull down and click select each data set in the results display. For example, if it says, "No results" be sure to pull down that list and go through each option to verify "no results" (or a list of results) for each box you checked.
May 28, 2016 2:16 AM # 
edwarddes:
I've always had good luck talking to the tech people in the GIS offices to get data. Normally they have a procedure for charging for it for data duplication, but most of the time if I talk a little tech with them, explain what I'm doing for a non profit, they will just give it to me on a drive I provide, or on dvds. I think the charges are really intended for engineering firms with client budges looking for data (for example see where Alex works).
I find it a lot easier to just have the whole dataset local rather than trying to download tiles all the time from web services. Frequently they have them as uncompressed tiffs, instead of the sids that a lot of places like to provide online.

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