{"book":"adl0131","page":356,"text":"کتاب ۳۴۵ مساحت\n\nاما ضروری است که در وقت شروع\nکردن کار پیمایش تغیر معلوم کرده شود\nاگرچه برای دریافت کردن تغیر ترکیب های بسیار میباشند\nاما ترکیب آسان و درست تراین است که وقت شب ستاره\nقطبی دیده شود و سه علمها باید که در سمت آن ایستاده کرده شود\nبذریعه آن صحیح صحیح شمال دریافت خواهد شد\nتمام شب باید که علمها ایستاده کرده باشند و بجای علم ها که\nایستاده کرده شده اند میخ ها باید که گور کرده شوند تا که احتمال\nتبدیلی مقام باقی نماند باز وقت صبح از کمپاس برینگ کا\nرا باید که شروع نمائید پس تغیر کمپاس ترکیب مذکوره بالا معلوم\nخواهد شد مثلاً اگر بیرنگ ۳ درجه ۴۵ منٹ معلوم باشد پس\nتغیر صحیح آله مذکوره از شمال بطرف مغرب برابر مقدار که از قریب\nآهن در سوزن (کمپاس) تغیر واقع میشود خواهد بود پس برا","chars":684,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00356.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/356","canvas":"https://afghanpress.org/iiif/adl0131/canvas/356","source":"https://afghanistandl.nyu.edu/books/adl0131/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0131_download.pdf","rights":{"image":{"statement":"Public domain. NYU states: \"All works presented on this website are, unless otherwise indicated, in the public domain. The images available on this website may be freely reproduced, distributed and transmitted by anyone for any purpose, commercial or non-commercial.\"","uri":"http://rightsstatements.org/vocab/NoC-US/1.0/","holder":"New York University Libraries","source":"https://afghanistandl.nyu.edu/about.html","delivery":"Images are served from a copy mirrored by this project, not from NYU's servers, under the reproduction terms above.","endorsement":"This is an independent project. It is not affiliated with, endorsed by, or reviewed by New York University."},"text":{"statement":"Machine-generated transcription, dedicated to the public domain under CC0 1.0. No warranty of accuracy: see the provenance block on every page.","uri":"https://creativecommons.org/publicdomain/zero/1.0/","holder":"Steps Ventures"}},"provenance":{"text_produced_by":"gemini-3.1-pro-preview","thinking_level":"low","read_completed":"2026-08-09","per_page_confidence":null,"per_page_confidence_note":"Not recorded during the corpus run. No calibrated per-page score exists, and none is estimated here.","human_reviewed":false,"accuracy_context":"Roughly two thirds of characters agree with a modern printed edition of the same text. Much of the disagreement is editorial, not misreading. Treat the transcription as a finding aid and read the page image before quoting.","primary_source":"The page image. The text is an index into it."}}