Evening star. [volume] (Washington, D.C.) 1854-1972, 1929-06-17
WASHINGTON MAP
COVERS WIDE AREA
Geological Survey Creation
Embraces aga Square
Miles.

A new edition of its large map OF
Washington and vicinity has Just been
produced by the Geological Survey of
the Department of the Interior and
covers an area of 464 square miles
| showing the surrounding territory of
/ Maryland and Virginia.
The map shows the latitude of Rock
| vile, Md, on to a line three miles
| south of Alexandria and from the
! Great Falls of the Potomac River on
| the west, to Forestville, Md, on the
east. Its scale is 81 $50 or two inches
10 the mile and measures Al by So In
cheS. The department explained today
| that 1t is primarily topographic map,
| showing the shape, size and relations of
surface irregularities by the use Of con-
| tour lines, following every 10-foot inter-
val OF altitude above sea level.
This map is considered of particular
interest and value to both officials and
private individuals concerned in the
development of the metropolitan area
of the National Capital, the department
explained, adding that 1t is also an ideal
map for the autoist, hiker and camper.
Department Comment.
Commenting on the new map. the
Department of the Interior said: 1.-The
new edition is published OPPORTUNITY for
use in the Investigations to determine
a suitable site for the much discussed
| airport Of the National Capital. For
this purpose it serves admirably. show
ing with engineering exactnesS the
| shape and altitude of the hills, valleys,
water bodies and streams, as we'll as all
! buildings, roads and other features that
must be considered in locating and
using an airport.
The map of Washington and vicinity
was first published in 1917. For the
! present edition the engraved copper
| plates were corrected from photographs
obtained by airplane flights covering
| the entire area by the Air Corps. u. S.
| A.. and from revision and corrective
work done by the Geological Survey.
The expansion of the Washington
urban area, the growth of suburban
! communities, and the progress in water
front improvement projects during the
! decade 1927 produce striking diff
! ference in appearance between the
original prints and the new map. A
new feature is the showing of certain
important political and administrative
subdivisions not hitherto adequately
mapped. These include the maglsterial
districts in Virginia, and the election,
! Maryland ashington metropolitan and
| suburban sanitary districts in Maryland.
Attention was also given to the Vir-
ginia- District of Columbia boundary,
which the map shows to be indefinite
for considerable portion of its length.
Another Feature Outlined.
Another feature of this edition Is
new highway classification. distinguish
ing roads of hard, impervious surface
| from those without dustproof surfacing
and also indicating other main Travelled
roads.
The map is printed in the Geolog-
| ical Surveys standard color scheme of
blue water features, brown contours,
| black lettering and cultural features
and red road classification.
In view of the wide circulation of
the first edition of this map, it is ex-
pected that this new edition. showing
the results of careful and extensive
revision will be in continuous demand.
1t is adapted for use either as a
mounted wall map or as a moderately
large scale desk map of such detail and
accuracy as to be serviceable in plan
ming general engineering projects,
municipal extensions aerial Develop
ments and highway locations. It retails
at IS cents a single copy or Is cents
each in lots of 20 or more and may
be obtained by applying to the director
Geological Survey, Washington, D. c."