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PDF reports#

Choose PDF report from Export overview when you need a shareable, human-readable record of a digitisation. GraphX generates the report locally in your browser and prepares it as an A4 PDF; the project and source image do not need to be sent to a server.

What the report contains#

The first page identifies the GraphX report and project, then presents a summary including the source-image name and dimensions, generation time, GraphX version, calibration status, dataset count, and point count. The report then combines the major parts of the work:

  • the source graph image, with digitised point overlays and a dataset-colour legend;
  • calibration and axis information, including the selected Fast or Perspective method and its references or corners;
  • each included dataset's point table, with axis labels, units, and dataset precision;
  • enabled trendline results, including model, equation, coefficients, R², fit and display ranges, intercept treatment, and relevant extrapolation information;
  • non-empty Project notes;
  • warnings about incomplete calibration or extrapolated points; and
  • a footer with provenance and page numbers.

Long tables and notes continue across pages. The report intentionally uses one consistent light report theme, regardless of the current light or dark application theme.

Graph image and overlays#

The report figure is based on the source image rather than a screenshot of the current zoomed or panned workspace. Point overlays are projected from the stored intrinsic image positions, so their location is independent of the browser window and current viewport. Dataset colours and point numbers identify the digitised series.

Enabled trendlines are also rendered over the figure when GraphX can sample their fitted curve through the current calibration. A trendline's visibility in the workspace and its PDF Export checkbox are separate choices: visibility controls the graph workspace, while Export controls report inclusion.

Dataset Export checkboxes control whether datasets appear in the report. Trendline Export checkboxes separately control which eligible trendline results are included. Keep a trendline's source dataset enabled as well: PDF generation works from the enabled dataset collection, so an unchecked source dataset cannot contribute its trend result to the report.

Point tables retain dataset order, axis labels and units, and dataset Precision. A PDF report can still be created with incomplete calibration; in that case it records the available image-space work and clearly marks graph-coordinate values as unavailable.

Trendline equations and coefficients use the trendline's own coefficient precision. GraphX may show a centred/scaled polynomial representation when that is needed for a numerically stable presentation; it is the same fitted curve, not a different model. For model assumptions and interpretation, see Trendline overview, Polynomial regression, and Understanding R².

Notes, warnings, and limits#

Project notes are included only when they are non-empty. Extrapolated points and trend display ranges are reported as context rather than silently treated as calibrated observations. The final notes section also records general digitisation limitations: a report is a useful record of the selected calibration and points, not proof that the source graph has been interpreted without uncertainty.

Use CSV when exact tabular interchange is the priority, and JPEG when an annotated visual image is more useful than a report. See CSV and copied data and JPEG export.