That was the issue. Thanks everyone for all the help; this product’s got a bit of a learning curve. :-)

That didn’t quite work, neither:

Needs["DatabaseLink`"]; conn = OpenSQLConnection["Dash"]; data = 
 SQLExecute[conn, 
  "SELECT latitude, longitude, altitude FROM points WHERE \
DATETIME(time/1000,'unixepoch','localtime') >= DATETIME('now','start \
of day','-1 days') AND DATETIME(time/1000,'unixepoch','localtime') < \
DATETIME('now','start of day') ORDER BY time"]; img = 
 GeoGraphics[Map[GeoCircle[Take[#, 2], Quantity[#[[-1]], "m"]]] &, 
  data]; myFileName = 
 "/Volumes/4TB External/Databases/Maps/" <> 
  Riffle[ToString /@ PreviousDate["Day"][[1]][[;; 3]], "-"] <> 
  "_circles.png";
Export[myFileName, img]

This is an example of what I started with; I wanted to create a new script that instead of the line would show the points with the accompanying margin of error. Most resulting maps would be zoomed enough to see large differences in the accuracy (the long excursion up to Atlanta and back was evacuating from Hurricane Irma in 2017).

Needs["DatabaseLink`"]; conn = OpenSQLConnection["Dash"]; data = 
 SQLExecute[conn, 
  "SELECT latitude, longitude FROM points ORDER BY time"]; img = 
 GeoGraphics[{Blue, Thick, Line@GeoPosition@data}, 
  GeoScaleBar -> "Imperial", ImageSize -> Full, 
  GeoBackground -> GeoStyling["StreetMap"]]; myFileName = 
 "/Volumes/4TB External/Databases/Maps/" <> 
  Riffle[ToString /@ PreviousDate["Day"][[1]][[;; 3]], "-"] <> 
  ".png";
Export["/Volumes/4TB External/Databases/Maps/alltrips.png", img]

OK, I did here with the data you supplied:

dbdata = {{27.9842, -82.5698, 2.55041}, {27.9847, -82.5702, 
   4.30254}, {27.9847, -82.5702, 4.30254}, {27.9847, -82.5702, 
   4.30254}}
Map[GeoGraphics[
   GeoCircle[Take[#, 2], Quantity[#[[-1]], "km"]]] &, dbdata]

Note that according to your spec "km" should be replaced with "m", but if you do so the resulting images will not show much interesting stuff due to the limited resolution of th emap

The output from the query looks like this (showing just the first part because it’s 57,000 points in the database and growing); basically triplets/vectors of {latitude, longitude, accuracy in meters}:

{{27.9842, -82.5698, 2.55041}, {27.9847, -82.5702, 4.30254}, {27.9847, -82.5702, 4.30254}, {27.9847, -82.5702, 4.30254}, … }

Sorry, but I’m still confused. I’m pulling the data from an SQLite database, and your response suggests that I’m supposed to enter it all manually. This language has got a steep learning curve.

Needs[“DatabaseLink`"]
conn = OpenSQLConnection["Dash"]; data = 
 SQLExecute[conn, 
  "SELECT latitude, longitude, accuracy FROM points WHERE DATETIME(time/1000,'unixepoch','localtime') >= DATETIME('now','start of day','-1 days') AND DATETIME(time/1000,'unixepoch','localtime') < DATETIME('now','start of day') ORDER BY time"];

This is going to give me tuplets (triplets, if you will) in response

Using Mathematica 12.0:

data = {{{45., 11.}, Quantity[100., "km"]}, {{48., 10.}, 
    Quantity[25., "Miles"]}};


Map[GeoGraphics[GeoCircle[#[[1]], #[[2]]]] &, data]