photo gps extract with some functions: Batch Extractor of many photos , save in spreadsheet, mapping with custom markers and right-clicked markers.

See also for extract AND SAVE (GeoJSOn or spreadsheet file):
http://stephane-mottin.blogspot.fr/2016/11/takes-directory-full-of-images-export.html

Exif and Geo-data

More and more modern digital cameras and smarphones have a built-in GPS module.
They record the latitude, longitude and elevation at the time a photo is taken (and other data in EXIF (Exchangeable image file format): https://en.wikipedia.org/wiki/Exif).

There are Meta information in a wide variety of files. There are different metadata formats including

• EXIF, GPS, IPTC, XMP, JFIF, GeoTIFF, ICC Profile, Photoshop IRB, FlashPix, AFCP, ID3, 
• as well as the maker notes of many digital cameras by Canon, Casio, DJI, FLIR, FujiFilm, GE, HP, JVC/Victor, Kodak, Leaf, Minolta/Konica-Minolta, Motorola, Nikon, Nintendo, Olympus/Epson, Panasonic/Leica, Pentax/Asahi, Phase One, Reconyx, Ricoh, Samsung, Sanyo, Sigma/Foveon, Sony...

Different methods of geotaging: 

the best = Automatic geotagging using a built-in GPS:

https://en.wikipedia.org/wiki/Geotagged_photograph

In regards to Point of interest (POI), many different file formats, including proprietary formats, are used to store point of interest data, even where the same underlying WGS84 system is used.

https://en.wikipedia.org/wiki/Point_of_interest

Some useful links which could be a basis of a metadata POI

https://en.wikipedia.org/wiki/Tourist_attraction

https://en.wikipedia.org/wiki/Lists_of_tourist_attractions

In french:

https://fr.wikipedia.org/wiki/Liste_des_monuments_historiques_du_Rh%C3%B4ne

the map:

https://tools.wmflabs.org/osm4wiki/cgi-bin/wiki/wiki-osm.pl?project=fr&article=Liste_des_monuments_historiques_du_Rh%25C3%25B4ne

Comparison of metadata editors:

https://en.wikipedia.org/wiki/Comparison_of_metadata_editors

apple desktop

apple photos and
the excellent graphic converter (shareware):
Graphic converter (v10) permet de sélectionner des dossiers, n photos...
et de sauvegarder un fichier .kml avec aperçus pour la sélection.

windows desktop

freeware pge

http://pge.bvsoft.be/pge6.php
PGE uses the Google Maps to show the coordinates of a photo. This means the application requires an active Internet connection: you can't use PGE offline.

There are several possibilities to locate a photo in Photo GPS Extract:

• Launch the program and open a photo through the menu File - Load Photo.
• Drag a JPG from your desktop or Windows Explorer, then drop it over PGE's main screen.
• Right-Click any JPG photo in Windows Explorer. Then click the "Send To" menu and select "Photo GPS Extract". PGE will now be opened and display the location of the photo.
• Right-click a JPG photo in Windows Explorer and select "Show GPS Location On A Map". (Please note you need to activate the option 'shell integration' before you can use this feature).

The Batch GPS Extractor is a tool to extract the coordinates from all pictures in a certain folder on your computer. This data can then be exported to a CSV file (Comma Separated Values) or a Google Earth .KML file. The Google Earth KML file generator offers a lot of options to customize your file.

Embedded map generator: Photo GPS Extract can generate the HTML code for your own embedded Google Map. This map can then be integrated in your website or BLOG (see the dialog was used to create the Google Maps).

Rem: "I deliberately decided NOT to build a geotagging feature. The design philosophy of Photo GPS Extract has always been the same: the software does NOT alter your photos in any ways."

For geotagging,  go to http://pge.bvsoft.be/geotagging.php

Multi-platform

open source

ExifTools

Read, Write and Edit Meta Information

https://en.wikipedia.org/wiki/ExifTool

http://owl.phy.queensu.ca/~phil/exiftool/

ExifTool is a platform-independent Perl library plus a command-line application for reading, writing and editing meta information in a wide variety of files. ExifTool supports many different metadata formats including EXIF, GPS, IPTC, XMP, JFIF, GeoTIFF, ICC Profile, Photoshop IRB, FlashPix, AFCP and ID3, as well as the maker notes of many digital cameras (by Canon, Casio, DJI, FLIR, FujiFilm, GE, HP, JVC/Victor, Kodak, Leaf, Minolta/Konica-Minolta, Motorola, Nikon, Nintendo, Olympus/Epson, Panasonic/Leica, Pentax/Asahi, Phase One, Reconyx, Ricoh, Samsung, Sanyo, Sigma/Foveon and Sony).

ExifTool is also available as a stand-alone Windows executable and a Macintosh OS X package: (Note that these versions contain the executable only, and do not include the HTML documentation or other files of the full distribution above).

https://sourceforge.net/projects/exiftool/files/?source=navbar

on line service

many...

try these:
http://photomap.booogle.net/
http://regex.info/exif.cgi
http://www.thexifer.net/guide.php