In this article we will discuss
how to create a layer
of points with ArcMap containing positions and links to » geotagged «
photos .
Geotagging is to specify the geographic coordinates photos
by
changing
their
data
(or tags) EXIF . EXIF
(Exchangeable Image file format) of a photo includes information
such as the camera type, date and time of shooting etc …
If you have a camera for shooting
equipped
with a GPS, the location data can be
included
automatically
. For example , if you have
an iPhone you can enable
geotagging pictures (see how to enable this page
: How
to turn photo geotagging on your iPhone or iPad).
If you don’t, you can use software
such
as Locr GPS Photo (free) or RoboGeo (fee) to include a
location in your images.
To download the software » Locr GPS Photo for Windows
« :
To download the software Robogeo
, go to this page: http://www.robogeo.com/home/download.asp
Suppose you use an
iPhone or equivalent . The images
integration
procedure in ArcMap is extremely simple.
1- copy your images in a directory .
Using Windows Photo Viewer , for example , make sure
that
the photos are oriented correctly
. Since you are going to link
the images to the created layer, the images will be viewed
directly
with ArcMap. Therefore, it is essential that
they are stored at the right place .
2-Open ArcMap and the Toolbox window. Launch
the
tool GeoTagged photos
to points
3-Set the tool .
It is possible to create an
output layer in shapefile, but
in
this
case
you
lose
the link to the images. You will only
have the position of these. Therefore, opt by a
storage
subclass as an entity of a file geodatabase .
4-
Run the
tool . The result appears in the cartographic window
.
You can change the images points symbology
to indicate the position of the photo.
In effect , if we display the
attribute table of the new layer created one observes a field
Direction.
To position the symbol according
to the direction of each image: open the properties layer -> tab
symbology
Click Advanced -> Rotate and select
the Direction field and the option Geographical
Now, the symbols show
the
orientation of the shooting on the ground.
To view an image from the corresponding
symbol in the map you can :
- the
tool information
In the window that opens the lit up symbols allow
opening
the
image linked to the corresponding point .
- use the HTML
popup
The image is interpreted
as
being
part
of the point information and is displayed automatically
