कामिक आगम: पूर्व भाग (अष्टाविंशति मूल शैव आगमों का प्रथम एवं सर्वोच्च आगम महाकोश)

Through the position of dhruva veda , the true north point could be ascertained.
And through the position of dhruva ta'ra. the exact east point could be determined.
From the beginning of the northern course of the sun, the declination of the shadow
of the sun will occur in the south of the east-west line. From the beginning of the
southern course of the sun, the declination of the shadow will occur in the north of
the east-west line. Based on this declination, the expert should know the magnitude
of apaccha'ya and ascertain the true east-west line. In the months of R's''abha
(April-May) and Kanya(August-September), there is no apaccha'ya. With half of
the measurement of the ground enclosed by the circle, the priest should draw the
square and mark the intermediary directions.
कर्णाभ्यां भुजसांयं तु कंपनेनार्जवेस्थिते।
जलेन तलसांयं स्यान् मध्यमे वाऽथ कर्णिके।। ३४
धाम्निप्राच्यथवा साध्य निश्चितान् पूर्ववास्तुनः।
प्राचीतरं तु यत्स्थानं सर्वदोषकरं भवेत्।। ३५
karn.a'bhya'm bhuja sa'myam tu kampanena'rjave sthite /
jalena talasa'myam syan madhyame va' tha karn.ike // 34
dha'mnipra'cyathava' sa'dhya nis'cita'n pu'rva va'stunah /
pra'ci'taram tu yatstha'nam sarvados''akaram bhavet // 35
The east-west line marked through the observation of the shadow
and the true east-west line coincide with each other on the summer solstice and
the winter solstice. Based on the central line and the diagonal line , the square
comprising the points of cardinal directions and intermediary directions is to
be drawn. For the constructions which face east, the magnitude of i's'a pra'ci
is to be ascertained. The construction whose east remains tilted towards south-east
(a'gneya pra'ci) is of the nature of creating all sorts of troubles .
इति कामिकाखशये महातन्त्रे क्रियापादे शङ्कुस्थापनविधिर्नाम पञ्चदशः पटलः
iti ka'mika'khye maha'tantre kriya'pa'de s'an'kustha'pana vidhirnama pan''cadas'ah pat'alah
This is the 15ᵗʰ chapter titled 'Directions for the Erection of Gnomon' in
the Kriya' section of the Great Agama called the KA'MIKA