Everglades Historical GIS Analysis

Smuggling Routes, Hidden Sites & the 1978 Coastline

The Outlaw Coast

For nearly a century, the Ten Thousand Islands have served as Florida’s untamed backdoor: a labyrinth of mangrove tunnels and oyster bars where the only law was the tide. In the 1920s, this “watery wilderness” became a haven for rum-runners who used the shallow, shifting channels to evade heavy Federal cutters, turning the quiet fishing villages of Chokoloskee and Everglades City into covert ports of call for Caribbean liquor. But the skills forged in that era, navigating the pitch-black backcountry without a chart, found a new purpose in the 1970s. As commercial fishing was restricted and the local economy cratered, the sons and grandsons of those early pioneers became “saltwater cowboys,” swapping mullet for marijuana. Under the cover of the mangrove canopy, they transformed these islands into one of the primary entry points for the “Square Grouper” era, hauling millions of pounds of contraband through a landscape that swallowed outsiders whole.

---

Points of Interest

import sys, platform
sys.path.append("..")

import pandas as pd
import geopandas as gpd
import matplotlib.pyplot as plt

from db_connection import query_to_geodataframe, query_to_dataframe
from map_builder import create_base_map, add_geodataframe_layer, add_point_markers, finalize_map

# Historical sites — already SRID 4326
sites = query_to_geodataframe("""
    SELECT id, name, description, site_type, year_established,
           significance_level, latitude, longitude, geom
    FROM historical_sites
""")

print(f"{len(sites)} historical sites loaded")

# Display table — drop significance_level, widen description
display_cols = sites[["name", "site_type", "year_established", "description"]].copy()
display_cols.columns = ["Name", "Type", "Year", "Description"]
display_cols.style.set_properties(
    subset=["Description"], **{"min-width": "350px", "white-space": "normal"}
)

21 historical sites loaded

	Name	Type	Year	Description
0	Everglades City Center	Town Center	1873	Epicenter of "Operation Everglades" (1983); the town where ~80% of the male population was arrested.
1	Watson's Place (Chatham Bend)	Homestead	1890	Site of the Ed Watson homestead; represents the area's deep history of lawlessness and isolation.
2	Chokoloskee Island	Settlement	1874	The primary island community connected to the mainland; home to Totch Brown.
3	Fakahatchee Strand State Preserve	Preserve	1974	Historic logging area often used for clandestine airstrips due to its remote, linear features.
4	Chevelier Bay	Bay	1920	Historic fishing grounds and smuggling route during Prohibition era.
5	Lopez River	Waterway	1920	Remote waterway used for rum-running and later marijuana smuggling operations.
6	Turner River	Waterway	1930	Historic canal and transportation route through the mangroves.
7	Halfway Creek	Creek	1910	Midpoint stop for traders between Everglades City and the outer islands.
8	Indian Key Pass	Pass	1500	Historic Calusa Indian site and later smuggling route.
9	Pavilion Key	Island	1900	Remote island used as a camp by fishermen and later as a drop point.
10	Rabbit Key	Island	1920	Small key used for temporary camps and clandestine meetings.
11	Mormon Key	Island	1880	Historic farming attempt site; represents failed settlement efforts.
12	Lostmans River	Waterway	1890	Extremely remote waterway; site of Ed Watson murders and ongoing lawlessness.
13	Shark River	Waterway	1800	Major waterway through the Everglades; historic Seminole route.
14	Flamingo	Settlement	1893	Remote outpost at the southern tip; historic fishing village.
15	Cape Sable	Cape	1838	Southernmost point; historic lighthouse and remote settlement.
16	Whitewater Bay	Bay	1900	Large shallow bay; historic fishing grounds and smuggling route.
17	Oyster Bay	Bay	1890	Historic oyster harvesting area; important food source.
18	Mound Key	Island	400	The Calusa were a highly complex, non-agrarian society that dominated the South Florida coast for over 1,500 years. Rather than relying on traditional agriculture, they utilized advanced estuarine aquaculture and engineered massive architectural features entirely from discarded shells
19	Ted Smallwood Store	Trading Post	1906	Historic trading post; central hub for locals, outlaws, and early trade.
20	Smallwood's Dock	Dock	1906	Original dock where supplies arrived by boat; critical supply line for the island.

---

The Smuggler’s Highway

To the uninitiated, the map of the Ten Thousand Islands is a chaotic splatter of green and blue, but to the smugglers, it was a precise network of arterial highways. The Barron River, the region’s dredged commercial heart, served as the brazen front door where shrimp boats laden with bales would dock under the guise of a night’s catch. Deeper in the backcountry lay the Chatham River, a historic channel echoing with the dark legacy of Edgar Watson, offering a direct, deep-water vein to the hidden interiors of the Glades. To the south, the Lopez River provided a winding “back alley” for smaller skiffs to slip unnoticed into the labyrinth, while the Wilderness Waterway, now a celebrated paddling trail, served as the “Inside Route,” a 99-mile concealed highway allowing traffickers to move illicit cargo from the Cape Romano shoals all the way to Flamingo without ever exposing themselves to the open Gulf or the Coast Guard’s gaze.

---

Route Details

# Historical routes — already SRID 4326
routes = query_to_geodataframe("""
    SELECT id, name, description, route_type, year_active, length_km, geom
    FROM historical_routes
""")

print(f"{len(routes)} routes loaded")
routes[["name", "route_type", "year_active", "length_km", "description"]]

5 routes loaded

	name	route_type	year_active	length_km	description
0	Chatham River Route	Water Route	1890	17.60	Water route from Chokoloskee to Watson's Place...
1	Lopez River Smuggling Route	Smuggling Route	1920	7.57	Historic rum-running and later marijuana smugg...
2	Wilderness Waterway (North Section)	Water Route	1900	105.47	Historic route through the Ten Thousand Island...
3	Lopez River Route	Smuggling Route	1978	NaN	Everglades City to Lopez River
4	Barron River Route	Water Route	1900	6.22	Main water route from Everglades City to Choko...

---

Smuggling Routes & Historical Sites

All layers on one interactive satellite map: the 1978 coastline, smuggling routes, and historical sites.

import folium

# Load coastline — transform SRID 4269 → 4326 for web maps
coastline = query_to_geodataframe("""
    SELECT
        ogc_fid,
        inform,
        attribute,
        class,
        ST_Transform(wkb_geometry, 4326) AS geom
    FROM "1978_fl_coastline"
""", geom_col="geom", crs=4326)

print(f"Coastline: {len(coastline)} features")

# Base map — satellite imagery centered on Ten Thousand Islands
m = create_base_map(center=[25.85, -81.35], zoom=10, tiles="satellite")

# --- Coastline layer (styled for satellite contrast) ---
shoreline = coastline[coastline["class"] == "SHORELINE"]
alongshore = coastline[coastline["class"] == "ALONGSHORE FEATURE"]

m = add_geodataframe_layer(
    m, shoreline,
    name="Shoreline (1978)",
    tooltip_fields=["inform", "attribute"],
    style={"color": "#38bdf8", "weight": 1.5, "opacity": 0.8},
)

m = add_geodataframe_layer(
    m, alongshore,
    name="Alongshore Features (1978)",
    tooltip_fields=["inform", "attribute"],
    style={"color": "#94a3b8", "weight": 1, "opacity": 0.6},
)

# --- Routes layer (amber/gold for satellite visibility) ---
m = add_geodataframe_layer(
    m, routes,
    name="Historical Routes",
    tooltip_fields=["name", "route_type", "year_active"],
    style={"color": "#fbbf24", "weight": 4, "opacity": 0.9, "dashArray": "8 4"},
    highlight={"weight": 6, "opacity": 1},
)

# --- Sites layer (wider popups, larger markers) ---
for _, site in sites.iterrows():
    color = "#f43f5e" if site["significance_level"] == "High" else (
            "#f97316" if site["significance_level"] == "Medium" else "#0ea5e9")

    folium.CircleMarker(
        location=[site["latitude"], site["longitude"]],
        radius=9 if site["significance_level"] == "High" else 6,
        color=color,
        fill=True,
        fill_opacity=0.8,
        tooltip=f"<b>{site['name']}</b> ({site['year_established']})",
        popup=folium.Popup(
            f"<div style='min-width:280px'>"
            f"<b>{site['name']}</b><br>"
            f"<i>{site['site_type']}</i> — {site['year_established']}<br><br>"
            f"{site['description']}"
            f"</div>",
            max_width=450,
        ),
    ).add_to(m)

m = finalize_map(m)
m

Coastline: 5689 features

Make this Notebook Trusted to load map: File -> Trust Notebook

---

Coastline Overview

# Filter out CARTOGRAPHIC LIMIT for a cleaner legend
coastline_display = coastline[coastline["class"] != "CARTOGRAPHIC LIMIT"]

fig, ax = plt.subplots(1, 1, figsize=(12, 8))

coastline_display.plot(
    ax=ax,
    column="class",
    legend=True,
    legend_kwds={"loc": "lower left", "fontsize": 8},
    linewidth=0.5,
)
ax.set_title("1978 Florida Coastline by Classification", fontsize=14)
ax.set_xlabel("Longitude")
ax.set_ylabel("Latitude")
plt.tight_layout()
plt.show()

---

Sites Timeline

import plotly.express as px

fig = px.scatter(
    sites,
    x="year_established",
    y="name",
    color="significance_level",
    symbol="site_type",
    title="Historical Sites — Timeline",
    labels={"year_established": "Year Established", "name": "Site"},
    color_discrete_map={"High": "#f43f5e", "Medium": "#f97316", "Low": "#0ea5e9"},
)
fig.update_layout(height=500)
fig.show()

---

Documentation & Source Data

The following sources document the historical routes and smuggling operations mapped in this analysis.

1. Barron River Route

Significance: The primary commercial artery. The 1983 “Operation Everglades” blockade physically shut down the only road (CR 29) and the river access to trap the smugglers.

• Primary: United States District Court, Middle District of Florida. “Operation Everglades” Case Archives (1983–1984).
• Secondary: Deep Water: The Story of the Beavers of Everglades City (Local history covering the dredging and subsequent bust).

2. Chatham River Route

Significance: Historically the deep-water access to the Watson Place. Smugglers used the high banks of the Chatham (rare in the mangroves) to offload onto higher ground (shell mounds).

• Primary: Tebeau, Charlton W. Man in the Everglades: 2000 Years of Human History in the Everglades National Park. University of Miami Press.
• Literary/Historical: Matthiessen, Peter. Killing Mister Watson. (Documents the river as the primary transit route for the region’s outlaws).

3. Lopez River Route

Significance: Named for the Lopez family (early settlers). It connects the inland bays to the Gulf, allowing for “inside” passage to avoid rough seas and patrols.

• Primary: Simons, M.H. “Report on the Ten Thousand Islands.” Annual Report of the Smithsonian Institution.
• Contextual: Brown, Totch. Totch: A Life in the Everglades. (Describes the specific use of these “backdoor” family channels for evading game wardens and later drug interdiction).

4. Wilderness Waterway (North Section)

Significance: The historic “Inside Route.” While officially established as a park trail in the 1970s, its channels were the standard “smuggler’s highway” to move goods between Everglades City and Flamingo without entering the Gulf of Mexico.

• Primary: Truesdell, William G. A Guide to the Wilderness Waterway of the Everglades National Park. University of Miami Press.
• Oral History: “Calusa to Campbell” (NPS Historic Resource Study) – details the usage of the inland cuts by locals to avoid “outside” detection.

Video Reference

Everglades City, Florida’s Bootlegging Capital – This video explicitly connects the 1920s rum-running era to the 1980s drug trade, illustrating how the same local families and geography facilitated both eras of smuggling.

---

Technical Details

Environment

print("Python:", sys.version.split()[0])
print("Platform:", platform.platform())
print("GeoPandas:", gpd.__version__)
print("Pandas:", pd.__version__)

Python: 3.11.9
Platform: Windows-10-10.0.26100-SP0
GeoPandas: 0.14.4
Pandas: 2.2.2

Coastline Data

print(f"Total features: {len(coastline)}")
print(f"CRS: {coastline.crs}")
coastline.head()

Total features: 5689
CRS: EPSG:4326

	ogc_fid	inform	attribute	class	geom
0	1	Jetty/Brkwater/Groin	Jetty.Bare	ALONGSHORE FEATURE	MULTILINESTRING ((-81.91294 26.42877, -81.9128...
1	2	Apparent Shore	Natural.Apparent.Mangrove Or Cypress	SHORELINE	MULTILINESTRING ((-81.88204 26.43101, -81.8820...
2	3	Apparent Shore	Natural.Apparent.Mangrove Or Cypress	SHORELINE	MULTILINESTRING ((-81.87071 26.43337, -81.8707...
3	4	Apparent Shore	Natural.Apparent.Mangrove Or Cypress	SHORELINE	MULTILINESTRING ((-81.83806 26.43486, -81.8379...
4	5	Pier, Ramp, or Dock	Pier	ALONGSHORE FEATURE	MULTILINESTRING ((-81.91804 26.43772, -81.9181...

Feature Breakdown

class_counts = (
    coastline.groupby("class")
    .size()
    .reset_index(name="count")
    .sort_values("count", ascending=False)
)
class_counts

	class	count
2	SHORELINE	4884
0	ALONGSHORE FEATURE	796
1	CARTOGRAPHIC LIMIT	9

inform_counts = (
    coastline.groupby("inform")
    .size()
    .reset_index(name="count")
    .sort_values("count", ascending=False)
)
inform_counts

	inform	count
0	Apparent Shore	3704
3	Gen. manmade object	783
5	Pier, Ramp, or Dock	685
6	SPOR	372
4	Jetty/Brkwater/Groin	108
1	Approx. Shore	23
7	User added line	9
2	Approximate Shore	2

Notes / Decision Log

• Data sources: PostgreSQL/PostGIS everglades_gis database
• CRS choices: Coastline transformed from SRID 4269 (NAD83) → 4326 (WGS84) via ST_Transform in the SQL query. Routes and sites are already 4326.
• Assumptions: Coastline features classified as SHORELINE vs ALONGSHORE FEATURE based on the class column from the original NOAA data. CARTOGRAPHIC LIMIT features filtered from the static map legend.
• Next steps: Overlay additional historical data; filter coastline to Everglades/Ten Thousand Islands extent for performance.