Alternative Text Description for 2 ft. Contours (CH2M_HILL)

TABLE OF CONTENTS

MAP OVERVIEW

This map displays two-foot elevation contour lines across coastal and southern Florida. The contours represent lines of equal elevation at two-foot vertical intervals, derived from LiDAR survey data. The map shows the topographic relief and terrain variations across the region, with contours appearing most densely in areas with varied elevation and more sparsely in flat terrain. This elevation data is certified to meet or exceed National Map Accuracy Standards and was produced for the Florida Division of Emergency Management.

GEOGRAPHIC CONTEXT

The map covers southern and coastal Florida, including the Atlantic coast from north of West Palm Beach southward through Miami, the Florida Keys extending southwest, and the Gulf of America coast including the Everglades, Naples, Cape Coral, and areas northward toward Port Charlotte. Major geographic features visible include Lake Okeechobee in the northern central portion of the map, the Everglades region labeled as "Immokalee" in the interior, and coastal cities including Miami, Hollywood, Boca Raton, Delray Beach, West Palm Beach, Jupiter, Naples, and Cape Coral. The map extends from the Atlantic Ocean on the east to the Gulf of America on the west.

KEY INSIGHTS

The contour distribution reveals significant variations in terrain elevation across the region. The densest concentration of contour lines appears along the Atlantic coastal corridor from Miami northward through the Palm Beach area, indicating more varied topography with greater elevation changes in relatively short distances. The southern tip of the Florida peninsula and the Everglades region show moderate contour density, suggesting gradual elevation transitions. The Florida Keys display sparse, linear contour patterns following the island chain. Large interior areas, particularly around Lake Okeechobee and portions of the western coast, show minimal or no contour lines, indicating very flat terrain with minimal elevation variation. The contrast between densely contoured coastal areas and sparsely contoured interior regions highlights Florida's generally low-relief topography with localized areas of modest elevation change.

VISUAL ELEMENTS

2 ft. Contours (CH2M_HILL)

This layer represents elevation contour lines at two-foot vertical intervals across southern Florida.

Elevation Contour Lines (brownish-tan lines)

Appearance:

The contours appear as thin, brownish-tan or olive-colored lines that follow terrain elevation patterns. The lines vary in spacing density depending on terrain steepness, with closely spaced lines indicating steeper slopes and widely spaced or absent lines indicating flat terrain.

Distribution:

Contours are present throughout the mapped area but with highly variable density. The Atlantic coastal zone from Miami to West Palm Beach shows the highest concentration. Moderate densities appear in the southern tip of the peninsula, portions of the Florida Keys, and scattered areas along the Gulf of America coast. Large interior regions, including areas around Lake Okeechobee and much of the Everglades, show minimal contour presence.

Notable locations:

Significant contour concentrations occur in the Miami-Fort Lauderdale-West Palm Beach metropolitan corridor along the Atlantic coast. The Florida Keys show distinctive linear contour patterns following the island chain orientation. The southwestern coastal area near Naples and Cape Coral displays moderate contour density. Interior regions remain largely flat with few visible contours.

Spatial patterns:

Contours generally follow north-south orientations along the Atlantic coast, reflecting the coastal ridge topography. In the Florida Keys, contours align with the southwest-trending island chain. The pattern reveals Florida's characteristic low-relief landscape, with elevation changes concentrated in specific coastal and transitional zones rather than distributed evenly across the region.

SYMBOL GUIDE

ADDITIONAL INFORMATION

This map focuses exclusively on the topographic contour layer extracted from LiDAR elevation data. Base map features such as city labels, water bodies, and boundaries are shown for geographic reference but are not part of the thematic contour dataset. The contours provide detailed elevation information useful for flood modeling, coastal planning, infrastructure development, and emergency management applications. Areas without visible contours indicate extremely flat terrain where elevation changes are less than the two-foot contour interval or occur very gradually. The LiDAR-derived data provides high-accuracy elevation information except in designated low-confidence areas where survey limitations may have affected data quality.

DATA CONTEXT

Data Source:

This elevation contour data was derived from LiDAR (Light Detection and Ranging) surveys conducted for the State of Florida Division of Emergency Management LiDAR Project Survey. The data collection and processing were performed under the guidance of a Professional Mapper/Surveyor and are certified to meet or exceed National Map Accuracy Standards, except in low-confidence areas. Data source layer name: TOPO2FT_CH2MHILL.

Definition Query:

No definition query or filter criteria was applied to this layer. The map displays the complete dataset of two-foot contours for the surveyed area.

Scale Information:

The map shows a regional view covering southern Florida at a scale appropriate for viewing broad elevation patterns across the entire region. At this zoom level, individual contour lines may appear dense in areas with varied topography. Closer examination at larger scales would reveal individual two-foot elevation intervals more distinctly.

Coordinate System:

NAD_1983_HARN_Florida_GDL_Albers (WKID 3087)

Time Period of Content:

The specific collection date for this LiDAR survey data is not provided in the available information.

Limitations:

While the contours are certified to meet or exceed National Map Accuracy Standards, certain low-confidence areas within the dataset may not meet these standards due to survey limitations such as dense vegetation, water surfaces, or other factors affecting LiDAR data quality. Users should consult the complete dataset documentation for information about specific low-confidence areas.

Map Coverage:

The map covers southern Florida from approximately Port Charlotte and the northern portions of Lake Okeechobee southward to the Florida Keys, and from the Atlantic Ocean westward to the Gulf of America coast. The exact geographic extent includes coastal and interior areas of the southern Florida peninsula.

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