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llavigne
it would be very useful that - when gps datas are missing from date1 to date2, - houdah interpolate position in between to suggest (en batch please) gps coordinate.
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houdah
Hi!

This is exactly what HoudahGeo does.

There are exceptions when both dates lie too far apart. Advanced users may configure this using Terminal.app. Most users should find the default values to work best.

Best,
Pierre Bernard
Houdah Software s.à r.l.
Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
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llavigne
Can you give me the steps to increase the date range ?
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houdah
Here's the relevant section from the Help:

The automatic geocoding algorithm comes pre-configured with sensible settings that should suffice for common uses of HoudahGeo.

The following should be read only by advanced users.


For special needs, you might however want to fine-tune those settings. Currently this can only be done on the command line in Terminal.app. Please quit HoudahGeo before proceeding.

Available settings are:

- gobbingLimit: Number of minutes by which to extend the search for tracks matching a given photo. This defaults to 5 minutes. A photo is considered to match up with a track if it falls within the track's time span of 5 minutes within the beginning or end of that time span.

- mergingLimit: GPS devices may start new tracks when turned on or after losing GPS signal. Strictly speaking we cannot geocode a photo that falls between two tracks. HoudahGeo however decided to merge two tracks if the time elapsed between the first track's end and the other track's beginning is less than 5 minutes.

- matchingLimit: HoudahGeo determines the location where a photo was taken by matching it up with two track points: one preceding and one following the time the photo was taken. If the closest point's timestamp is more that 10 minutes before or after the photo was taken, HoudahGeo considers there is no match and does not geocode the photo. A value of 0 disables this check.


On the command line you may set one of these preferences by entering a command similar to the following:

defaults write com.houdah.HoudahGeo gobbingLimit 5

You may revert to the default settings by issuing the following commands:

defaults remove com.houdah.HoudahGeo gobbingLimit
defaults remove com.houdah.HoudahGeo mergingLimit
defaults remove com.houdah.HoudahGeo matchingLimit


HoudahGeo copies these settings into your project documents. Projects created before setting these preferences retain their old settings.

Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
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Tembo: Easy and effective file search
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llavigne
Thanks.

I tried the following settings
defaults write com.houdah.HoudahGeo mergingLimit  1440
defaults write com.houdah.HoudahGeo gobbingLimit 1440
defaults write com.houdah.HoudahGeo matchingLimit 0

Because a lot of my photos were within same location as boundaries but the geologger was either turned off or had lost tracking.

I am getting holes in different photos now and I noticed that the time stamp of the photos had been changed by the previous houdah geo write to exif.
I think what happened is the new time stamp was set to the timezone the gps captured - whereas the photos were still in pacific time.

Am I changint the setting properly for what I am trying to achieve and how do I geo tag only a selection ?


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http://www.previs.org
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houdah
Hi!

I wouldn't push these limits all that high. You will get nonsensical results if a photo is geocoded to a tack point that is off by a whole day.

HoudahGeo - if configured correctly - does not "change" the timestamp. If you set HoudahGeo to write timestamps on EXIF export, it does however correct the timestamp by factoring in the clock error. For later processing of the same photo, you should no longer set the clock error. HoudahGeo writes the timestamp with time zone information. Here it differs from most cameras which are not timezone aware. This is the reason why HoudahGeo has to ask for the camera time zone. If the image has already embedded timezone information, the HoudahGeo setting is ignored.

Best,
Pierre Bernard
Houdah Software s.à r.l.
Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
HoudahSpot: Advanced file search utility
Tembo: Easy and effective file search
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llavigne
So if I understand properly if images have already been exif updated by the houdah, and that the update included the timezone, then on the second pass I am trying to process, where I extended the search time range for the images which did not get geotagged, the jpg that are already geotagged will be ignored?

How would you geocode a series of files which lie somewhere between two tracks? (not by hand) the first image is 12h after the previous track and 5h before the next track
______________
http://www.previs.org
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houdah
Hi!

You may force HoudahGeo to geocode images by selecting "Clear Coordinates" and then "Geocode all" from the "Geo" menu.

The "Geo" menu also has options to copy-paste coordinates from one image to another. Maybe the coordinates for the last geocoded image are appropriate for the ones off the end of the track log.

Please do give Google Earth geocoding a try. It is really convenient.

Best,
Pierre Bernard
Houdah Software s.à r.l.
Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
HoudahSpot: Advanced file search utility
Tembo: Easy and effective file search
0 0