Topic: Flood Zone GIS Data

[dfarris75]

I am looking for flood zones that I can download and import into Civil 3d/Map 3d. I have been able to find all sorts of free data from roadways to railroads to soil maps, but flood maps are evading me. Are they available as shapefiles?

[mjfarrell]

have you gome looking at GEOCOMM.COM?

what specific area or site are you after, perhaps I can track some down and link it your way


Good Morning Florida!

[dfarris75]

Florida in general, but Duval County mostly since a majority of our work is here.

[mjfarrell]

are you familiar with this site: http://maps.coj.net/website/DuvalMaps/viewer.htm?

[mjfarrell]

that's rare....

GEOCOMM has your county data, however only as a 'premium' download to get the entire county coverage is about 16$ us dollar....http://data.geocomm.com/catalog/US/61093/2787/index.html

[dfarris75]

Yes of course. It's only one of the best GIS sites available. Only problem is I cannot download the flood zone data as a shape file, dlg, etc. I guess I gotta make do with what I have because everywhere I find flood zone data you have to pay for it.

[mjfarrell]

NO however you CAN save the image file and insert it under your drawing....you will need to A)rubber sheet it to fit your known site coordinatesd, or B) create a(n) geo reference file to go with the saved image.

[dfarris75]

Tell me how to create a georeference file o my own. That would come in pretty handy.

At present I've been creating a "firmette" via the fema map service center site and then underlaying it, but their north orientation seems off on their maps so I end up rotating it anyway so accuracy is off.

[dfarris75]

Not to mention their roads are sorely outdated. See attached where I have downloaded a firmette and turned transparency ON so the aerial shows through. There's a road down the middle of the development that is way off.

[mjfarrell]

Tell me how to create a georeference file o my own. That would come in pretty handy.

At present I've been creating a "firmette" via the fema map service center site and then underlaying it, but their north orientation seems off on their maps so I end up rotating it anyway so accuracy is off.

world file


or try these guys..they seem to have it...only their web site is about inpenatrable...
www.sjrwmd.com

[mjfarrell]

very ODD, the FEMA site doesn't even show DUVAL county as an option.... :ugly:

http://msc.fema.gov/webapp/wcs/stores/servlet/CategoryDisplay?storeId=10001&catalogId=10001&langId=-1&categoryId=12001&parent_category_rn=12009&type=1&stateId=&countyId=&communityId=&stateName=&countyName=&communityName=&dfirm_kit_id=&dfirmCatId=12009&isCountySelected=1&isCommSelected=1&userType=G&urlUserType=G&sfc=0&cat_state=13016&cat_county=13430&cat_community=339434

oh yeah that and they aren't free...

[mjfarrell]

OK, I did find them there...http://www.msc.fema.gov/webapp/wcs/stores/servlet/MapSearchResult?storeId=10001&catalogId=10001&langId=-1&panelIDs=1200770162E$1200770236E$1200770166E$1200770229E$1200770154E$1200770144E$1200770231E$1200770164E$1200770155E$1200770207E$1200770163E$1200770143E$1200770226E$1200770142E$1200770206E$1200770237E$1200770209E$1200770168E$1200770141E$1200770233E$1200770134E$1200770232E$1200770228E$1200770227E$1200770161E$&Type=pbp&nonprinted=&unmapped=

however it wasn't the most direct....and it looks like they are $2.50/per FIRM Map...I would hope that cost is in the project budget.

[dfarris75]

Wouldn't it be somewhat difficult to create a world file when you are saving an image from the web at variable scales? The resolution and scale values might be hard to nail down. Coordinates too, at least on the coj system.

[dfarris75]

We can download about any gis data we need for free, but the FEMA maps. Why is that?

[mjfarrell]

Wouldn't it be somewhat difficult to create a world file when you are saving an image from the web at variable scales? The resolution and scale values might be hard to nail down. Coordinates too, at least on the coj system.

see rubber sheeting comment above