20250708
09572100
1.0
FALSE
SEAGRASS2024
002
Projected
GCS_North_American_1983_HARN
Linear Unit: Foot_US (0.304801)
NAD_1983_HARN_StatePlane_Florida_West_FIPS_0902_Feet
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20250708
09265900
20250708
9471500
1152
1152
FGDC
Casey O'Toole
NV5
Analyst
541-752-1204
Unit 126
Corvallis
Oregon
97330
US
20250708
ArcGIS Metadata
1.0
Enterprise Geodatabase Feature Class
SDERPT.SDECREATOR.SEAGRASS2024
2025-05-09
Casey O'Toole, NV5
vector digital data
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Southwest Florida Water Management District (SWFWMD) is responsible for the protection and management of natural systems and water quality within its geographic boundaries. One component of evaluating the ecological health of coastal ecosystems is to map and monitor submerged aquatic vegetation (SAV) communities. This project is a continuation of previous efforts to determine the status and trends (if any) of SAV resources in the coastal waters of the District. The results of this effort will be used to determine the performance of ongoing efforts to improve water quality and quantity in coastal waters of the District. The dataset serves as documentation of the seagrass habitat within St. Joseph Sound and Clearwater Harbor, Tampa Bay, Sarasota Bay, Lemon Bay and Charlotte Harbor as it existed in 2024. Seagrass data were photo interpreted from 2024 1”=1,800’ photo scale natural color aerial photography and classified using the SWFWMD modified FLUCCS classification system. Horizontal accuracy of meets NMAS for 1:12,000 scale maps. The minimum mapping unit for classification was 0.25 acres.</SPAN></P></DIV></DIV></DIV>
Creation of a 2024 seagrass map from 1”=1,800’ photo scale natural color aerial photography that is consistent with and aligned to the previous 2022 seagrass map. This data was produced for the SWFWMD's "Biennial Seagrass - Suncoast 2024 (W331)" project.
NV5
Casey O'Toole
NV5
Analyst
541-752-1204
1100 NE Circle Blvd
Unit 126
Corvallis
Oregon
97330
US
Sarasota Bay
St. Joseph's Sound and Clearwater Harbor
Charlotte Harbor
Lemon Bay
Southwest Florida Water Management District
Tampa Bay
map
coastal
2024 seagrass
habitat
submerged vegetation
sav
FLUCCS
benthic
map
coastal
2024 seagrass
habitat
submerged vegetation
sav
FLUCCS
benthic
Sarasota Bay
St. Joseph's Sound and Clearwater Harbor
Charlotte Harbor
Lemon Bay
Southwest Florida Water Management District
Tampa Bay
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The positional accuracy of this data meets USGS NMAS for 1:12,000 scale maps. This data has a minimum classification accuracy of 90% for all categories. Mapping conventions applied to the delineation and classification of seagrass categories were: 1) Outer boundaries of beds are more important than internal structure (patchiness, shapes of sand patches within beds). 2) Outer boundaries of beds are more important than density categorization within beds. 3)Minimum Mapping Unit (MMU) is 0.25 acres. It is more important to include small isolated patches than similar sized patches that were a part of a large matrix. Care should be taken in mapping small areas of seagrass when only a small amount of seagrass is present, e.g. around a spoil island. When deciding whether an area with patches of seagrass was one polygon of patchy seagrass or individual seagrass polygons, apply the guideline of MMU of 0.25 acres. If an area has a few patches under 0.25 acres err on the side of including these rather than excluding them.</SPAN></P></DIV></DIV></DIV>
Translation of files to formats other than those described here is the sole responsibility of individuals downloading the data. The data are being provided on an 'as is' basis. The District specifically disclaims any warranty, expressed or implied, including, but not limited to, the implied warranties or merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user. In no event will the District or its staff be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if the District has been advised of the possibility of such damages. All data are intended for resource management use.
Esri ArcGIS 13.0.0.36056
true
-82.8540
-81.9571
28.1747
26.6932
Extent contains the resource
2024-01-01
2024-12-31
Map was visually screen-inspected to 100% attribute accuracy as of 2025/05/09. Map was verified at above 90% accuracy by independent client WSP USA Environment and Infrastructure.
Not provided
Dataset was checked for valid values, duplication, and topology using rules of no gaps and no overlaps.
Dataset represents a complete wall-to-wall vector coverage of the survey area.
Features were symbolized down to 10m accuracy as supplemented by local field work.
Not provided
Dataset does not have a Z axis.
Not provided
Imagery dataset used to align linework from 2022 data
1152
2024 SWFWMD Seagrass Survey Imagery - Flown and Provided to NV5 by Surdex Corporation
2024 Imagery - Surdex Corp.
2025-05-09
Surdex Corporation
remote-sensing image
observed
2024-01-01
2024-12-31
The dataset serves as documentation of the seagrass habitat within St. Joseph Sound and Clearwater Harbor, Tampa Bay, Sarasota Bay, Lemon Bay and Charlotte Harbor as it existed in 2022.
1152
2022 SWFWMD Seagrass Survey Linework
2022 SWFWMD Seagrass Survey Linework
2025-05-09
Mapping and GIS Section, Southwest Florida Water Management District
vector digital data
observed
2022-01-01
2022-12-31
Source produced by 2024 linework layer of polygons reflecting any changes made from 2022 linework
1152
2024 SWFWMD Seagrass Survey Change Analysis
Change Analysis
2025-05-09
NV5
vector digital data
observed
2024-01-01
2024-12-31
Source produced by 2024 linework layer of polygons reflecting an area summary in acres of multi-feature polygon areas for each FLUCCS code attribute.
1152
2024 SWFWMD Seagrass Survey Acreage Summary
Acreage Summary
2025-05-09
NV5
vector digital data
observed
2024-01-01
2024-12-31
Supplemental imagery dataset specifically targeting turbid areas revealed by "2024 Imagery - Surdex Corp" and used to further align linework from 2022 data.
1152
2024 SWFWMD Seagrass Survey Imagery - Flown and Provided by NV5
2024 Imagery - NV5
2025-05-09
NV5
remote-sensing image
observed
2024-01-01
2024-12-31
Linework was adjusted from previous year's version to match the updated 2024 imagery for the same area.
2025-05-09
2024 Imagery - Surdex Corp.
2022 SWFWMD Seagrass Survey Linework
2024 Imagery - NV5
Change Analysis
Acreage Summary
30255
SEAGRASS2024
Feature Class
Feature Class
Feature Class
30255
OBJECTID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Integer
8
Shape
Feature geometry.
Esri
Coordinates defining the features.
Integer
8
FLUCCSCODE
FLUCCSCODE
Integer
4
10
0
Class codes from the Florida Land Use, Cover and Forms Classification System (FLUCCS), which was originally compiled by Florida Department of Transportation, State Topographic Bureau.
FDOT
The set of all FLUCCSCODE values.
FLUCCSDESC
FLUCCSDESC
String
80
0
0
Class codes from the Florida Land Use, Cover and Forms Classification System (FLUCCS), which was originally compiled by Florida Department of Transportation, State Topographic Bureau.
FDOT
The set of all FLUCCSDESC values.
DATESTAMP
DATESTAMP
Date
8
0
0
The date the data were added to SDE.
SWFWMD
The set of all DATESTAMP values.
Shape.STArea()
Shape.STArea()
Double
0
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
Shape.STLength()
Shape.STLength()
Double
0
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
dataset
EPSG
6.3(9.0.0)
Simple
FALSE
30255
TRUE
FALSE