GROUND SPECTROMETRY DATA - A BASIS OF REMOTE SENSING DATA 
VERIFICATION 
N.P. Ogar‘“, M.I Bitenbaev””, B.V. Gel’dyev“, A.I. Polyakov®, A.A. Loctionov” 
“ Institute of Botany and Phytointroduction, Ministry of Education & Science, 480090 Almaty, 
Kazakhstan-envirc@nursat.kz 
? Physics-Technical Institute, Ministry of Education & Science, 480082 Almaty, Kazakhstan- 
slepchenko75@mail.ru 
* Center for Remote Sensing and GIS “Terra” Ltd, 480100 Almaty, Kazakhstan-terra@nursat.kz 
KEYWORDS: Ground spectrometry, Remote sensing, Vegetation, Identification, Hemp 
ABSTRACT: 
In the paper the optical reflection spectra of native hemp and contiguous plants are presented. The spectra were obtained by ground 
spectrometry methods in field condition. The analysis of spectra shapes has been carried out, and the ground spectrometry data have 
been compared with remote sensing results. 
1. INTRODUCTION 
Now world community faces the challenge bound up with 
permanent growth of production, traffic and usage of narcotic. 
In Kazakhstan and other Central Asia countries the situation is 
aggravated with the availability of large territories occupied by 
native narcotic plants like hemp and ephedra. 
For management of action on reduction and it is necessary the 
precise information about their location, spread dynamics and 
resource potential. It should be noted that such an information 
demands continuous renewal, i.e. the persistent monitoring of 
spreading of narcotic plant kinds is required. All above 
conditions can be satisfied with help of modern technologies of 
remote sensing and geoinformation mapping. However, for 
reliable verification of the remote sensing results information 
about spectral characteristics of supervised subject is needed. 
In literature the works containing information about so-called 
spectral signatures of narcotic vegetation was not found by us. 
Therefore in this work we set a problem to obtain and 
systematize the spectral characteristics of native hemp and 
contiguous plants by methods of ground spectrometry on 
specially selected subsatellite test sites in Shu valley of 
Kazakhstan, and to compare the acquired results with the 
remote sensing data of specific test site. 
2. PROCEDURE AND SUBJECT OF SUPERVISION 
Field investigations were conducted in Shu valley of 
Kazakhstan on which territory the native hemp occupied areas 
no less than thousand hectares. The spectrometric measurements 
have been performed on about thirty various sites with native 
hemp. On surveyed sites both pure and mixed hemp thickets 
were observed. Among contiguous kinds the most similar to 
hemp by “greenness” (chlorophyll content in leaves) are turned 
out Glycyrrhiza uralensis, Artemisia scoparia, Onopordon 
acanthum and Cynodon dactylon. So, we recorded and analyzed 
the solar radiation reflection spectra both for hemp and basic 
contiguous plants. 
114 
The field spectrometric investigation were performed in wave 
length diapason 375-1025 nm by portable spectroradiometer of 
FieldSpec^HandHeld (HH), UV/VNIR model of Analytical 
Spectral Devises company (Colorado, USA) possessing 512 
channels and spectral resolution approximately 3nm over the 
entire range of 700 nm. 
The solar radiation reflection spectra from vegetation canopy 
were recorded. For this the spectroradiometer, with help of 
special adjustment, was placed above the canopy and standard 
target was on the level of vegetation canopy. As a standard 
target we use polyvinylchloride plate with the size of 1x1 m. 
The comparative analysis was conduct with the remote sensing 
results obtained with use of IKONOS satellite system. This 
satellite has four spectral channels in wavelength interval of 
visible and near infrared spectrum range: first multi-spectral 
channel MS-1(blue)-480,3 nm, the second - MS-2 (Green)- 
550,7 nm, the third - MS-3 (red) - 664, 8 nm, the fourth - MS-4 
(NIR=Near Intra Red) - 805 nm. 
3. RESULTS AND DISCUSSION 
In Figures 1-2 there are the solar radiation reflection spectra 
from both hemp and contiguous plants canopies and takyr 
(dense clay soil without vegetation) obtained by ground 
spectrometry method. One can see from the Figures that all 
plant spectra have analogous shape typical for green vegetation, 
and glycyrrhiza and hemp spectra are quite similar. And so for 
identification criteria definition of considered plant kinds by 
their spectral characteristics it was performed an analysis of 
relative intensities of the reflection peaks for fair spectra 
quantities obtained at different recording conditions. As a result 
of such detailed analysis it was provided the data given in Table 
1 where NDVI is conventional normalized index of vegetation 
difference which value is defined as: 
Internati 
Here 
wavele: 
i.e. 805 
A coef 
ratio: 
where 
wavele 
1.0 
0.8 
0.6. 
reflectance 
04. 
02 
0.0 
0.8 
0.7 
0.6 
0.5. 
04. 
0.3. 
reflectance 
0.2. 
0.1- 
0.0- 
Figure 1 
objects, 
a) | 
scopari