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Ground Truth Image Database for Global Scale Research
Yoshiaki Honda*, Koji Kajiwara* and Yoshiaki Kimura**
*: CEReS (Center for Environmental Remote Sensing), Chiba University
1-33 Yayoi, Inage-ku, Chiba 263, JAPAN
FAX: +81-43-290-3857 E-mail: yhonda@rsirc.cr.chiba-u.ac.jp
**: Konica co,. 1 Sakura, Hino, Tokyo 191, JAPAN
Introduction
From 1972, many people have talked about Global Environmental Problem. Many
researchers have made many ground truth surveys. They have used their own surveying method.
There are huge information about the Earth by ground truth. However, those information is too
detailed for ordinal people. Even scientist in a kind of field can not understand information in other
kind fields. Many surveyor took many pictures in their field survey. These pictures are one of the
most understandable information in other fields. In this paper Image database system for global scale
research is reported.
1. Important Information
Ordinal photographs can give us many
information. For example, we can recognize
landcover, vegetation condition and vegetation
type etc., from pictures. If these pictures have
location and time which pictures had been taken,
these are very useful data for ground truth. But
almost pictures have no information of taken
Figure 1 Prototvne GPS camera
291
location. Existing of location information is
depend on each surveyor. Because of no
recording function of location in the ordinal
camera.
If location information can be seen in
pictures, all these pictures can be used
meaningful. However, Location and time
information are not enough for ground truth.
Ground truth picture should include taking
direction and inclination. Therefore,
important information for ground truth
are image, location, date, direction and
inclination.
2. System
Ground truth image data are managed
by the ground truth image database.
These image data is taken by GPS
camera (produced by Konica). Figure
1 shows a prototype GPS camera.
Figure 2 shows GPS camera type 3.
GPS camera can add location
information in pictures. Figure 3
shows result of GPS camera. The
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996