: Ration, or reclamation of swamp areas—are mad 
be u%?d in the publication o 
* M X A. mm • * \ «w 4 
tgijfe^bhe dialf mOe\ with a contour, ifihS 
v? ’A. 
.C,' s 
r V 
&s in which there are problems ofjverage 
A, 
Us 
m 
ch as most of the basin of the Miftiasippi 
s* are made ^vith sufficient accuracy ta A u ed 
f. ♦ 
t 
■ • j£4 
3o*% of maps on a ‘scale of (1 inch ^e>||arlj 
j, witli a opnifiLiir interval of 10 to 25 feet. - £ 
njweys of aifus in which the problems are of minor 
Ir^ portanjCfc^uch as much of the mountain or desert 
< ’New Mexico, are made with sui 
> 1 
gg^the- .publication of ma ■ Sn ifllfL-of 
£ , ■ „ If 
cy to be 
u 
teh=d|<s8jyz miles), with a contour int^ : 
Li' 
survey of Alaska has 
an a nearly 37 per cent of its area has now b^ 
y ■* v 
•ft 
■ 4 » 
I 
■ fO per cent of the Territory has been covered byaecop- 
or about 10 miles to In 
MeMof the remaining area surveyed in Alaska has 
on a scale of but about 4,000 sauare miles 
Wd on a scale of 
i s on a scale of ^ 
Q V*- * „ 
r -Av -j 
s 
&f the Hawaiian Islands has b* 
(bps are published on. a scale d 
shown on these maps May b 
water.. M ding seas, lakes*M 
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