<?xml version="1.0" encoding="ISO-8859-1"?>
<metadata>
	<idinfo>
		<citation>
			<citeinfo>
				<origin>Advanced GeoSpatial Inc.</origin>
				<pubdate>Unknown</pubdate>
				<pubtime>Unknown</pubtime>
				<title>Effective Karst Features (Buffers)</title>
				<geoform Sync="TRUE">raster digital data</geoform>
				<onlink Sync="TRUE">\\Agisdc01\W\Projects\2006\PR2006-031_Leon_AVA\Mgmt\Leon_grids\karst_buff</onlink>
				<ftname Sync="TRUE">karst_buff</ftname></citeinfo>
		</citation>
		<descript>
			<abstract>Effective Karst Features were derived from the 20 foot DEM.  The DEM was produced for Leon county from LiDAR collected from 3/26/2003 to 4/17/2003. Initially the depressions were located by using the &lt;fill&gt; function in ArcGIS&gt;Spatial Analyst&gt;Hydrology Tools.  The filled depressionless elevation model was subtracted by the unfilled a  20 foot DEM set to calculate the extent of the filled areas.  These areas were then filtered for size (at least 3 contiguous cells) and depth (the maximum depth of each grouping had to exceed 3 feet) before applying a circular index filter to select features that were more circular than others. These features were then buffered at 30 foot intervals to a distance of 12,600 feet.</abstract>
			<purpose>To represent karst features in Leon County.</purpose>
			<langdata Sync="TRUE">en</langdata></descript>
		<timeperd>
			<timeinfo>
				<sngdate>
					<caldate>unknown</caldate>
				</sngdate>
			</timeinfo>
			<current>publication date</current>
		</timeperd>
		<status>
			<progress>Complete</progress>
			<update>As needed</update>
		</status>
		<spdom>
			<bounding>
				<westbc Sync="TRUE">-84.716600</westbc>
				<eastbc Sync="TRUE">-83.976798</eastbc>
				<northbc Sync="TRUE">30.685831</northbc>
				<southbc Sync="TRUE">30.272977</southbc>
			</bounding>
			<lboundng><leftbc Sync="TRUE">1900411.250000</leftbc><rightbc Sync="TRUE">2132971.250000</rightbc><bottombc Sync="TRUE">463322.687501</bottombc><topbc Sync="TRUE">613102.687501</topbc></lboundng></spdom>
		<keywords>
			<theme>
				<themekt>ISO 19115 Topic Category</themekt>
				<themekey>Geoscientific Information</themekey>
				<themekey>Karst</themekey>
				<themekey>Closed topographic depressions</themekey>
			</theme>
			<place>
				<placekey>Leon County</placekey>
			</place>
		</keywords>
		<accconst>none</accconst>
		<useconst>Maps generated as part of this project were developed by Advanced GeoSpatial Inc. (AGI) to provide Leon County with a ground-water resource management and protection tool to carry out agency responsibilities related to natural resource management and protection regarding the Floridan Aquifer System. Although efforts were made to ensure information in these maps is accurate and useful, neither Leon County nor AGI assumes responsibility for errors in the information and does not guarantee that the data is free from errors or inaccuracies. Similarly, AGI and Leon County assume no responsibility for consequences of inappropriate uses or interpretations of the data on these maps. Accordingly, these maps are distributed on an "as is" basis and the user assumes all risk as to their quality, results obtained from their use, and performance of the data. AGI and Leon County further make no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its suitability for any particular purpose. The burden for determining suitability for use lies entirely with the end user. In no event shall AGI or Leon County, or their respective employees have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the project results. AGI and Leon County bear no responsibility to inform users of any changes made to this data. Anyone using this data is advised that resolution implied by the data may far exceed actual accuracy and precision. Because this data was developed and collected with Leon County funding, no proprietary rights may be attached to it in whole or in part, nor may it be sold to Leon County or other government agency as part of any procurement of products or services.</useconst>
		<ptcontac>
			<cntinfo>
				<cntorgp>
					<cntorg>Leon County</cntorg>
				</cntorgp>
				<cntvoice>850-488-2818</cntvoice><cntfax>850-922-0099</cntfax><cntaddr><addrtype>mailing and physical address</addrtype><address>301 S. Monroe St.</address><city>Tallahassee</city><state>FL</state><postal>32301</postal></cntaddr></cntinfo>
		</ptcontac>
		<datacred>
Advanced GeoSpatial Inc.
2441 Monticello Dr., Suite 600
Tallahassee, FL 32303
850.580.4447
</datacred>
		<native Sync="TRUE">Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500</native>
		<crossref>
			<citeinfo>
				<origin>Advanced GeoSpatial Inc.</origin>
				<pubdate>Unknown</pubdate>
				<pubtime>Unknown</pubtime>
				<title>Effective Karst Features (buffers)</title>
				<serinfo><sername>Leon County Aquifer Vulnerability Assessment A Ground-Water Protection and Management Tool</sername></serinfo></citeinfo>
		</crossref>
		<natvform Sync="TRUE">Raster Dataset</natvform></idinfo>
	<dataqual>
		<lineage>
			<procstep>
				<procdesc>
Setup Spatial Analyst options and then set extent and parameters equal to LIDAR derived DEM. Convert float grid to integer using the following raster calculator algorithm	&lt; int([float.lidar] + 0.5) &gt;.  Next use the FILL function in Spatial Analyst Tools to fill sinks and then subtract the filled surface from DEM (integer grid) surface.  The result is a grid showing all of the depressional areas within the study area.  Cell values for this step are the diffence on a cell by cell basis between the filled grid and the DEM

Using the CON request the filled features were converted to a grid of 1's and No Data in order to proceed with filtering.  The following command was typed into the raster calculator dialog &lt; CON (([filled] - [DEM] &gt;= 1), 1) &gt;.  This will give positive cells a value of 1 and all others a null value.  Next, the FOCAL STATISTICS Tool located in the Neighborhood Toolbox of the Spatial Analyst Tools was used to remove small discontinuous clusters.  This was accomplished using the Focal Majority function with a rectanglar neighborhood while using a 3 x 3 cell area and the statistics type set to majority.  Uncheck the box for ignore no data.  The EXPAND Tool located in the Spatial Analyst&gt;Generalization Toolbox was then used to expand the remaining areas by two cells.  This step is done to expand the zones that were filtered back to or near their original size (the focal majority function decreases the area of larger features).

Grid Calculations - This process is performed as repeated steps to derive the circular index values for nested features.  Nested features are those topographic depressions that might have multiple concentric contour lines that would otherwise be masked out a larger depressional area from the filled grid

1.)  Begin with the Filled grid with all of the values (these ranged from 1-76 feet)
2.)  Perform repetitive step requiring several iterations usign the raster calculator:
a.) con([Filled] &gt; = 5, 5)
b.) con([Filled] &gt; = 10, 10)
c.) Repeat unitl the maximum value of 76 is reached (grouped 65-76 into one group
d.) Make grids permanent and then convert to shapefiles
e.) Merge individual hapefiles into one shapefile (For visualization purposes be sure to order the files from smallest (5) to largest (65) in the toolbox dialog while performing the merge)
3.)  Calculation of Circular Index - Taken from Denizman, 2003 Morphometric and Spatial Distribution Parameters of Karstic Depressins, Lower Suwannee River Basin, Florida.  Circular index references the roundness of the depression feature by dividing the area of the polygon divided by the area of an ideal circle with the same perimeter.
a.) Add six fields to the merged karst layer, Area, Perimeter, Cir_D (circle diameter), Cir_R (circle radius), Cir_A (circle area), Cir_index (Circular index).
b.) All fields are number fields with Double precision
1.) Area - ArcMap calculation (See ArcMap help)
2.) Perimeter - ArcMap calculation (See ArcMap help)
3.) Cir_D : Perimeter / pi
4.) Cir_R : Cir_D/2
5.) Cir_A : pi * (Cir_R2)
6.) Cir_index : Area polygon / Cir_A
c.) Select all areas with a Cir_index of 0.4 and greater and convert to a grid
*Note: Recent work in other counties has indicated that a circular index of 0.8 is more appropriate, however, the nature of the source material for this grid makes it impossible to use a value that high.  This is due to the use of GRIDs as the intial starting point and the shape of the features.  Had acutal smoothed contours been derived from the grid prior to processing a larger number could have potentially been used*

Upon completion of the previous step it is necessary to group the karst features giving each a unique region.  This is done using the Spatial Analyst Tool, Region Group located in the Generalization Toolbox.  This tool will record for each cell in the output the identity of the connected region to which it belongs within the analysis window.  Then, using Zonal Statistics and more specifically the Zonal Max function to assign a maximum depth value to each feature.  Use the Spatial Analyst; Raster Calculator and type &lt; Zonalmax ([region.group], [fill.value],Data) &gt;.  Then using the raster calculator again to select all of those grouped regions with a depth greater than 3 feet.  This step will remove from the effective karst feature data set all of the areas that are less than 4 feet maximum depth

From this final step the Karst features were buffered in 25 foot intervals to a maximum distance of 12,600 feet.  This value was the maximum distance you could be from any karst feature with a circular index of 0.4 within the study area.
</procdesc>
				<procdate>June 2007</procdate>
				<proccont>
					<cntinfo>
						<cntorgp>
							<cntorg>Advanced GeoSpatial Inc.</cntorg>
						</cntorgp>
						<cntaddr>
							<addrtype>mailing and physical address</addrtype>
							<address>2441 Monticello Dr.</address>
							<city>Tallahassee</city>
							<state>FL</state>
							<postal>32303</postal>
							<country>US</country>
						</cntaddr>
						<cntvoice>850-580-4447</cntvoice>
					</cntinfo>
				</proccont>
				<procsv>ArcGIS 9.1</procsv></procstep>
			<procstep>
				<procdesc>Dataset copied.</procdesc>
				<srcused>U:\Projects\FAVA\Wekiva_FAVA\model\evidence\wek30_krst</srcused>
			</procstep>
			<procstep>
				<procdesc>Metadata imported.</procdesc>
				<srcused>C:\DOCUME~1\Cichon_j\LOCALS~1\Temp\xml1C6.tmp</srcused>
			</procstep>
			<procstep><procdesc Sync="TRUE">Metadata imported.</procdesc><srcused Sync="TRUE">C:\DOCUME~1\Cichon_j\LOCALS~1\Temp\xmlC5.tmp</srcused><date Sync="TRUE">20070703</date><time Sync="TRUE">09541400</time></procstep></lineage>
	</dataqual>
	<spdoinfo>
		<direct Sync="TRUE">Raster</direct>
		<rastinfo>
			<rasttype Sync="TRUE">Grid Cell</rasttype>
			<rowcount Sync="TRUE">7489</rowcount>
			<colcount Sync="TRUE">11628</colcount>
			<vrtcount Sync="TRUE">1</vrtcount>
			<rastxsz Sync="TRUE">20.000000</rastxsz><rastysz Sync="TRUE">20.000000</rastysz><rastbpp Sync="TRUE">16</rastbpp><rastorig Sync="TRUE">Upper Left</rastorig><rastcmap Sync="TRUE">FALSE</rastcmap><rastcomp Sync="TRUE">Default</rastcomp><rastband Sync="TRUE">1</rastband><rastdtyp Sync="TRUE">matrix values</rastdtyp><rastplyr Sync="TRUE">TRUE</rastplyr><rastifor Sync="TRUE"></rastifor></rastinfo>
	</spdoinfo>
	<spref>
		<horizsys>
			<planar>
				<planci>
					<plance Sync="TRUE">row and column</plance>
					<coordrep>
						<absres Sync="TRUE">20.000000</absres>
						<ordres Sync="TRUE">20.000000</ordres>
					</coordrep>
					<plandu Sync="TRUE">survey feet</plandu>
				</planci>
				<mapproj><mapprojn Sync="TRUE">Lambert Conformal Conic</mapprojn><lambertc><stdparll Sync="TRUE">29.583333</stdparll><stdparll Sync="TRUE">30.750000</stdparll><longcm Sync="TRUE">-84.500000</longcm><latprjo Sync="TRUE">29.000000</latprjo><feast Sync="TRUE">1968500.000000</feast><fnorth Sync="TRUE">0.000000</fnorth></lambertc></mapproj></planar>
			<geodetic>
				<horizdn Sync="TRUE">D_North_American_1983_HARN</horizdn>
				<ellips Sync="TRUE">Geodetic Reference System 80</ellips>
				<semiaxis Sync="TRUE">6378137.000000</semiaxis>
				<denflat Sync="TRUE">298.257222</denflat>
			</geodetic>
			<cordsysn><geogcsn Sync="TRUE">GCS_North_American_1983_HARN</geogcsn><projcsn Sync="TRUE">NAD_1983_HARN_Lambert_Conformal_Conic</projcsn></cordsysn></horizsys>
	</spref>
	<eainfo>
		<detailed Name="karst_buff.vat">
			<attr>
				<attrlabl>Count</attrlabl>
			</attr>
			<attr><attrlabl Sync="TRUE">Rowid</attrlabl><attalias Sync="TRUE">Rowid</attalias><attrtype Sync="TRUE">OID</attrtype><attwidth Sync="TRUE">4</attwidth><atprecis Sync="TRUE">0</atprecis><attscale Sync="TRUE">0</attscale><attrdef Sync="TRUE">Internal feature number.</attrdef><attrdefs Sync="TRUE">ESRI</attrdefs><attrdomv><udom Sync="TRUE">Sequential unique whole numbers that are automatically generated.</udom></attrdomv></attr><attr><attrlabl Sync="TRUE">VALUE</attrlabl><attalias Sync="TRUE">VALUE</attalias><attrtype Sync="TRUE">Integer</attrtype><attwidth Sync="TRUE">4</attwidth><atprecis Sync="TRUE">0</atprecis><attscale Sync="TRUE">0</attscale></attr><enttyp>
				<enttypl>Effective karst features (buffers)</enttypl>
				<enttypd>Distance to a karst feature that has been filtered based on size and shape.</enttypd>
				<enttypt Sync="TRUE">Table</enttypt><enttypc Sync="TRUE">151</enttypc></enttyp>
			<attr>
				<attrlabl>Value</attrlabl>
				<attrdef>Buffered interval values (feet)</attrdef>
			</attr>
			<attr><attrlabl Sync="TRUE">COUNT</attrlabl><attalias Sync="TRUE">COUNT</attalias><attrtype Sync="TRUE">Integer</attrtype><attwidth Sync="TRUE">4</attwidth><atprecis Sync="TRUE">0</atprecis><attscale Sync="TRUE">0</attscale></attr></detailed>
	</eainfo>
	<distinfo>
		<distrib>
			<cntinfo>
				<cntorgp>
					<cntorg>Leon County</cntorg>
				</cntorgp>
				<cntaddr>
					<addrtype>mailing and physical address</addrtype>
					<city>Tallahassee</city>
					<state>FL</state>
					<postal>32301</postal>
					<country>US</country>
					<address>301 S. Monroe St.</address></cntaddr>
				<cntvoice>850-488-2818</cntvoice><cntfax>850-922-0099</cntfax></cntinfo>
		</distrib>
		<resdesc>Downloadable Data</resdesc>
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					<dssize Sync="TRUE">74.234</dssize></digtinfo>
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		<metc>
			<cntinfo>
				<cntorgp>
					<cntorg>Advanced GeoSpatial Inc</cntorg>
					<cntper>James Cichon</cntper>
				</cntorgp>
				<cntaddr>
					<addrtype>mailing and physical address</addrtype>
					<address>2441 Monticello Dr.</address>
					<city>Tallahassee</city>
					<state>FL</state>
					<postal>32303</postal>
					<country>US</country>
				</cntaddr>
				<cntvoice>850-580-4447</cntvoice>
			</cntinfo>
		</metc>
		<metstdn Sync="TRUE">FGDC Content Standards for Digital Geospatial Metadata</metstdn>
		<metstdv Sync="TRUE">FGDC-STD-001-1998</metstdv>
		<mettc Sync="TRUE">local time</mettc>
		<metextns>
			<onlink>http://www.esri.com/metadata/esriprof80.html</onlink>
			<metprof>ESRI Metadata Profile</metprof>
		</metextns>
		<metextns>
			<onlink>http://www.esri.com/metadata/esriprof80.html</onlink>
			<metprof>ESRI Metadata Profile</metprof>
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