GPS Geotagger Simple Info

• Computer
• Operation system (Windows)
• Browser (Firefox)
• Photos
• Internet connection
• exiftool

Never original photos

Never use original photos!

The reason why original photos should not be used is not the insecurity of the »GPS Geotagger Simple«. Many more things can happen that can destroy a photo file during the editing process, such as a power failure and many more failures. If originals are used, then a possible loss is purely your own fault.

No upload

There is no upload!

The loading of files into the webpage is not a upload and includes not a upload. An upload requires a form element with specification of a URL to which the data should be sent. The style of the buttons of an input element is the same as that of a form element. However, in »GPS Geotagger Simple« there are only input elements and no form elements. So in »GPS Geotagger Simple« default there is no upload. However, there is a possibility of modifying the »GPS Geotagger Simple«.

No map at startup

To avoid useless load on the map servers, no maps are loaded at startup. There are 5 different maps to choose from. Please be careful with the choise of the maps.

Path to Photos

The security restrictions of the browsers do not allow to read the full locale file path. For the displaying of the photos and for the creating of the exiftool command is the full locale file path needed. There will not be send to everywhere except inside the browser.

Only JPG

The »GPS Geotagger Simple« is only testet with JPG files (photos). The ExifReader and the exiftool can handle more than JPG.

No subfolder

The »GPS Geotagger Simple« can default read only single or multiple files or single directorys without subfolders inside. However the most browsers can read single directorys with subfolders inside. The »GPS Geotagger Simple« is not compatible for this. This is a matter of the arrangement of the »GPS Geotagger Simple« as "simple".

Path to exiftool.exe

For the creating of the exiftool command is the full path to the storage location of the exiftool.exe are needed. There will not be send to everywhere except inside the browser. Only the full local path without "exiftool.exe".

Own exiftool commands

It is posibble to use own exiftool commands. This commands will be added in the commands text by every command line of each photo file. They exists many of exiftool commands to manipulate the EXIF data in a photo. The default functionallity of exiftool makes a copy of the original files as FILENAME.JPG_original and manipulate afterwards the FILENAME.JPG. The »GPS Geotagger Simple« generates exiftool commands that includes the command -overwrite_original and with this exiftool makes not a copy of the original. For this and other cases please use only copies of photos and never the originals. More information and more commands are listed on the exiftool webpage.

Photo list resizeable

The box for the photo list is default a little bit small in the height. This is due to the design of the webpage and under consideration of smaller monitors. The list box is vertical resizeable. In addition it is possible to hide (toggle) a few of boxes in the sidebar via the ↓↑ button in the top right corner. For furthermore space use the browser fullsize mode with the F11 keyboard key (toggle). Last but not least it is possible to use the zoom in the browser (Ctrl and - or +).

Anyone is allowed to download the »GPS Geotagger Simple«, use it locally and modify it. The possibilities of modification are widespreaded.

Save the path to photos/exiftool

The simplest modifying of the »GPS Geotagger Simple« is to use it local and save the path to photos and exiftool.exe. For this it is necessary to set and save the value of the input box.

<input type="text" id="imagepathlocalid" class="imagepathlocalclass" value="C:\my\privat\path\to\my\privat\photo\folder" placeholder="C:\path\to\photo\folder">.

<input type="text" id="exiftoolpathlocalid" class="exiftoolpathlocalclass" value="C:\my\privat\path\to\the\exiftool" placeholder="C:\path\to\exiftool\folder">.
Please consider that its only the path in wich the "exiftool.exe" is saved and not a path with included "exiftool.exe"

Select multiple photos

A multiple selecting of photos for set one coordinate to all selected is possible. It is a little bit complex and not »simple« and for this reason not included in the »GPS Geotagger Simple«. For a better workflow without that expanding of the script it is possible to activate the keyboard shortcuts in the script code.

Keyboard shortcuts

For the "▲" and "▼" pager buttons and the "SET" button there is a keyboard shortcuts function included in the »GPS Geotagger Simple« and by default disabled.

Subfolder loading

An example of modifying is the loading of directorys with subdirectorys inside. The corresponding HTML code is already prepared:

<input type="file" onchange="inputfileload(event)" webkitdirectory multiple>.

In the modifying use "webkitRelativePath" (webkitEntries) to read the relative paths of the subdirectorys.

Google Maps & Bing Maps

It is possible to modifying the »GPS Geotagger Simple« for using Google Maps & Bing Maps or other maps. For this it is necessary to expand the choice of the map in the script code for the OpenLayers map loading. For both its a personal API Key necessary.

GPS geotagging with GPX route

It is possible to modify and expand the »GPS Geotagger Simple« for GPS geotagging with a GPX route. Loading a GPX Route in the map is easy. Compare the date-time in the GPX route and photo EXIF for grabbing the coordinates is also easy with JavaScript.

Photo zoomable

For the display of the current photo there is a function included in the script to dislpay the photo in a map with zoom and move, but the performance of this is not so good. For the display of the current photo you can include a script that use CSS to make it zoomable:
Wheelzoom

For the display of the current photo you can include a script that use canvas to make it zoomable:
Simple Pan and Zoom Canvas

Attention for modified »GPS Geotagger Simple«

Please attention for modified »GPS Geotagger Simple« that are not modified by yourself. It is possible to modify it to a dangerous tool.

The precission of GPS is dependent of the position after decimal point. The OpenLayers uses a mathematical endless precission, because it is calculated by the pixels on the monitor. In the most cases in OpenLayers the GPS coordinates are rounded or fixed (truncate). The dimensions of the map is a stretched form, because the earth is no flat or quadratic. The displayed maps are created from peoples on computers via satellite photos. The satellite photos are not 1:1 to the real ground on the earth and deformed to fit the map. There are tolerances in all of this. In addition, it should be noted that although the earth is round, but also noncircular. Last but not least, the longitudes are very close to each other at the poles and very far apart at the equator. This also affects the precission in a screen map. Because of the stretched form of the map, the precision is very accurate at the poles and less at the equator.

The »GPS Geotagger Simple« fixed (truncate) the GPS coordinates to 6 digits after decimal point. This is a average precission of theoretical/mathematical 0.1 meter. When using the map, it becomes visible that the markers are not always very accurate. This has many technical reasons. The whole thing can't be done without a certain amount of tolerance.

The table shows a average precission.

##############################
#      GPS PRECISSION        #
##############################
#Coordinates#Dist. in m#fixed#
##############################
#1.00000000°#111120.000#    0#
#0.10000000°# 11112.000#    1#
#0.01000000°#  1111.200#    2#
#0.00100000°#   111.120#    3#
#0.00010000°#    11.112#    4#
#0.00001000°#     1.111#    5#
#0.00000100°#     0.111#    6#
#0.00000010°#     0.011#    7#
#0.00000001°#     0.001#    8#
##############################

It is possible and alowed to download the »GPS Geotagger Simple« for locale use and for modifying. Download page

Please report failures, useful hints and mistakes. Please tell whole world about the »GPS Geotagger Simple«. Please share it with your friends. Please make a donation.