# Alternative Text Description for RCI/NHD(24K) Intersection

## TABLE OF CONTENTS

- Map Overview
- Geographic Context
- Key Insights
- Visual Elements
- Symbol Guide
- Additional Information
- Data Context

## MAP OVERVIEW

This map displays the intersection points between Florida Department of Transportation roads and National Hydrography Dataset water drainage flowlines across the State of Florida. The map shows where roads cross or abut streams, rivers, artificial paths, and other water drainage features. Two U.S. Coast Guard districts, District 7 and District 8, are shown as reference boundaries overlaying the state.

## GEOGRAPHIC CONTEXT

The map covers the entire State of Florida and portions of neighboring states including southern Georgia and Alabama. Major cities labeled on the map include Miami, Tampa, St. Petersburg, Orlando, Jacksonville, Tallahassee, Pensacola, Gainesville, Cape Coral, Palm Coast, Palm Bay, Lakeland, Port St. Lucie, West Palm Beach, and Coral Springs. The map extends from the Panhandle region in the northwest, along both the Gulf of America coastline to the west and the Atlantic Ocean coastline to the east, down to the southern tip of the Florida peninsula including the Keys. The Straits of Florida are labeled in the southeastern portion of the map.

## KEY INSIGHTS

The map reveals an extensive network of road-water crossings throughout Florida, with intersection points distributed across the entire state. The density and distribution of these intersection points suggest a comprehensive dataset capturing where transportation infrastructure interacts with the state's extensive water drainage system. No dominant spatial pattern is immediately apparent beyond the general correspondence with Florida's road network and hydrographic features statewide.

## VISUAL ELEMENTS

### RCI/NHD(24K) Intersection Layer

This layer represents the geographic locations where FDOT roads intersect with National Hydrography Dataset flowlines throughout Florida.

### USCG District Boundaries

**Appearance:**

Two distinct districts are shown with different colors - District 7 in blue and District 8 in purple. These appear as large polygonal areas covering different portions of Florida.

**Distribution:**

District 7 appears to cover the majority of Florida's peninsula and southeastern coastal areas. District 8 covers the Florida Panhandle and northwestern portions of the state along the Gulf of America coast.

**Notable locations:**

The boundary between the two districts runs roughly through the Big Bend area of Florida's Gulf coast, separating the Panhandle region from the peninsula.

**Spatial patterns:**

The districts represent administrative boundaries for the U.S. Coast Guard and do not appear to relate directly to the road-water intersection data, but provide jurisdictional context for the mapped area.

### Overlapping Patterns

The road-water intersection points overlay the USCG district boundaries, indicating that these infrastructure crossing locations exist within both Coast Guard jurisdictional areas across the state.

## SYMBOL GUIDE

- **Blue polygon:** U.S. Coast Guard District 7 boundary
- **Purple polygon:** U.S. Coast Guard District 8 boundary

## ADDITIONAL INFORMATION

This map is used in the EST (Environmental Screening Tool) for notification purposes, allowing users to identify specific locations where road infrastructure interacts with water drainage systems. The map displays reference data from two USCG districts but focuses primarily on the intersection points between transportation and hydrographic features. The actual intersection point features may be too small to distinguish individually at this map scale but represent a comprehensive statewide dataset.

## DATA CONTEXT

**Data Source:**

The data represents the point result of intersecting two layers: FDOT_LOCALNAMES (Florida Department of Transportation local road names) and NHD24FLOWLINE (National Hydrography Dataset 24K-scale flowlines) for the State of Florida. The intersection identifies locations where FDOT roads cross or abut water drainage flowlines including streams, rivers, artificial paths, and similar features. Source layer name: RCI_NHD24FLOW_APR18.

**Definition Query:**

No definition query or filter criteria was applied to this view.

**Scale Information:**

The map shows a statewide extent appropriate for understanding the overall distribution of road-water crossings across Florida. Individual intersection points may not be visible at this scale.

**Coordinate System:**

NAD_1983_HARN_Florida_GDL_Albers (WKID 3087)

**Time Period of Content:**

The source data indicates an April 2018 timestamp (APR18), suggesting the intersection analysis was performed using data current as of that date.

**Limitations:**

For detailed source dates, inputs, and parent/child relationships, users should consult the dataset metadata. The map displays reference boundaries (USCG districts) that are not part of the primary thematic dataset.

**Map Coverage:**

The map extends across the full geographic extent of Florida and includes small portions of neighboring states for spatial context. Coverage includes Florida's mainland, panhandle, and the Florida Keys.

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The alternative text description of this map was AI-generated and may contain inaccuracies.