Table 3 
Comparison of ERTS-1 interpretation map 1:250, 000 with Soil Map Baddjoz, Scale 1:250, 000 
and ITC Student Soil Map Scale 1:1,000, 000 based on aerial photo-interpretation 
Mapping 
Symbol 
ERTS-1 
Phys. Soil Map 
ERTS-1 1:250, 000 
Symbol 
API 
Phys. Soil Map API 
1:100, 000 
Symbol 
SMB 
Soil Map Province Bad&joz 
1:250,000 (SMB) 1 
API 
SMB 
A 
Alluvial valleys 
A 
Well coinciding 
1 
Coinciding, except border 
NW of Montijo (inclusion of 
soils on shales & arkose 
+ D 
+ 
+ 
O 
Undulating to rol 
ling on oligocene 
°1 
Erosion terrace 
P 
Well coinciding except 
area south of Merida 
2a,8, 
13 
Differ mainly because of 
survey approach a. p. i. & 
ERTS interpretation (phys) 
versus soil chars 
+ 
+ 
0 
°2 
Complex of arkosa 
clays, and ranas 
o,c 
Generally well 
coinciding 
8 
Agrees in extent, but not in 
contents; very complex unit 
mapped as a single unit on 
S. M. B 
+ 
+ 
0 
°3 
Arkose 
o 
Generally well 
coinciding 
8,13 
Delineation coincides, see 
further above 
4- 
+ 
0 
R 
Ranas 
R 
Moderately well coin 
ciding. Some units not 
visible on ERTS-1 
imagery 
13 
Moderately well coinciding; 
too generalized unit N of 
Montijo and S. of Rio Alca- 
zaba wrongly interpreted 
unit (arkose) 
0 
4- 
0 
M 
Miocene clay 
M 
Generally well coin 
ciding,sub-divis ions 
differ. Group II has 
interchanged M 
and M 2 
3,4c, 
10,15b, 
15c 
Delineation of M as a whole 
mod. well coinciding, extent 
not so accurate;phys. not 
well expressed;description 
of soils differ;distribution 
of sub-units within M quite 
different (phys. !) 
4- 
+/o 
0/- 
Q 
Quartzitic hills 
s 
Generally well coin 
ciding, more genera 
lized in ERTS-1 map; 
some limestone inter 
preted as quartzite NE 
of Montijo on ERTS-1 
map. 
4a, 5b. 
9a 
Differs from lithology in the +/0 
field;Sierra de San Serv&n is 
mainly quartzite;area s. of 
Guadiana river (near Don Al 
varo) is schist. Hilly area N. of 
Torremayor is to a limited ex 
tent limestone, but mainly Quartzite. 
+ 
F 
Rolling on 
limestone 
L 
Coinciding mod. well; 
more generalized in 
ERTS-1 map 
4a, 10 
Mod. well coinciding with 
regard to geographical 
extent 
0 
+ 
0 
G 
Undulating to 
rolling on 
granite 
G 
Well coinciding 
5c 
Well coinciding, more 
generalized, rocks are 
all intrusive acidic 
rocks 
4- 
4- 
+ 
D 
Undulating to 
rolling on diorite 
and schists 
D 
Mod. well coinciding, 
on ERTS-1 map schists 
are included; compa 
rison difficult 
5c, 7b 
Moderately well coinciding 
units are more generalized 
in soil map of Badljoz 
0 
4- 
0 
^qualitative rating of coincidence with regard to field check: 
+ = good; 0 = moderate; - = poor 
05 Ol CO 
gO £ O tj O O ^41 hd td 
212