Geolocation alternate databases

[wywh]

I experimented with alternate Geolocation.dat files and got them working by adding this line to example.config file:

Code Select Expand

$Image::ExifTool::Geolocation::geoDir = '/Users/matti/Desktop/a';
A minor trouble was how to set build_geolocation to use cities500.txt as an input (macOS 14.5). This fails:

Code Select Expand

ls
admin1CodesASCII.txt alternateNamesV2.txt cities500.txt example.config
admin2Codes.txt build_geolocation countryInfo.txt featureCodes_en.txt

./build_geolocation -p 50 cities500.txt .
Error opening database ./allCountries.txt
After renaming cities500.txt as allCountries.txt it works:

Code Select Expand

./build_geolocation -p 50 .
Reading ./allCountries.txt... Done.
Reading ./featureCodes_en.txt
Reading ./countryInfo.txt
Reading ./admin1CodesASCII.txt
Reading ./admin2Codes.txt
Reading ./alternateNamesV2.txt... Done.
Processing database entries... Done.
Writing ./Geolocation_out/Geolocation.dat (version 1.03) and AltNames.dat...
Writing 18 language files to ./Geolocation_out/GeoLang...
Output file size(s):
    4.92 MB Geolocation.dat (183245 entries)
    4.84 MB AltNames.dat
    4.90 MB GeoLang/*.pm
   14.67 MB Total
I was surprised that even <500 places are included in that database:

Code Select Expand

exiftool -config example.config -a -api Geolocation='Velkua'
Geolocation City                : Velkua
Geolocation Region              : Southwest Finland
Geolocation Subregion           : Turku
Geolocation Country Code        : FI
Geolocation Country             : Finland
Geolocation Time Zone           : Europe/Helsinki
Geolocation Feature Code        : PPLA3
Geolocation Feature Type        : Seat Of A Third-order Administrative Division
Geolocation Population          : 220
Geolocation Position            : 60.4667, 21.6668
- Matti

[Phil Harvey]

Hi Matti,

A minor trouble was how to set build_geolocation to use cities500.txt as an input (macOS 14.5).

Try downloading the current version of build_geolocation.  This should work.  I just tested it here and it works for me.

I was surprised that even <500 places are included in that database:

Add the -v option to see why this is happening:

Code Select Expand

> build_geolocation -p 50 cities500.txt -l '' -v
Languages to read from input database(s):
  <none>
Parameters for reading cities500.txt:
  Minimum populations (??=any country):
    ??=50
  Features to keep regardless of population:
    ??=PPLA,PPLA2
  Features to keep for population >= minimum:
    ??=PPL,PPLA,PPLA2,PPLA3,PPLA4,PPLA5,PPLC,PPLCH,PPLF,PPLG,PPLH,PPLL,PPLQ,PPLR,PPLS,PPLW,PPLX,STLMT
(I usually add -l '' to the command only to speed things up for testing purposes.)

Oh, right.  You meant in the input cities500.txt from geonames.org.  They use the same logic to ignore population for some admistrative features.  Check their readme.txt file.

- Phil

[wywh]

Doh, just deleting . from the end fixed that:

Code Select Expand

./build_geolocation -p 50 cities500.txt
- Matti

[Phil Harvey]

Doh, just deleting . from the end fixed that:

Yeah.  Doh.  I didn't notice that.  Yes, the command will read multiple databases if there are multiple file/directory names on the command line.

- Phil