{"book":"adl0131","page":240,"text":"کتاب ۲۴۹ مساحت\n\nزاویه های قائمه ساخته کشیده میباشند و در پایان تخته مذکور یک\nمدور چوب چسپیده میباشد که سر پایان چوب مذکور نوکدار میباشد\nتاکه کراس یعنی آله بالای زمین افتاده بتواند بغرض شکل تخته\nمذکور مانند میز مدور میباشد\n(۱۸۳) یک خط مستقیم و یک نقطه بیرون خط مستقیم مذکور\nمعلوم است. از نقطه مذکور عمودیکه برخط مستقیم معلوم قائم باشد\nمقام عمود مذکور را بوسیله کراس معلوم کنید ج\nفرض کنید که الف ب خط مستقیم و ج بیرون د الف\nخط مستقیم مذکور یک نقطه معلوم است بالای نقاط الف و ب\nو ج علمها ایستاده کنید و در خط الف ب یک نقطه فرض کنید که\nدر مقام تقاطع عمود مطلوبه یاقریب عمود مطلوبه باشد و در همیجا\nکه نقطه مطلوبه است کراس یعنی آله که برای پیمایش\nزمین مستعمل میباشد کراس را بر مقام د آنقسم میخ کنید که برکراس","chars":702,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00240.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/240","canvas":"https://afghanpress.org/iiif/adl0131/canvas/240","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."}}