Download Datractor from here:
https://github.com/mauricio-camargo/Datractor/raw/main/deploy/datractor.zip
Datractor is a small freeware program written in Lazarus FreePascal for extracting graph and map data points directly from PDFs and images.
Datractor é um pequeno programa aberto escrito em Lazarus FreePascal para extrair valores de gráficos e mapas diretamente de PDFs e imagens.
Windows only.
Video tutorial (47 seg): https://youtu.be/GI8dnzxbOVk
Citation:
Camargo, M.G. 2023. Datractor 1.1: an open source software for extracting graph and map data points directly from PDFs and images. v. 1.1. https://github.com/mauricio-camargo/Datractor