Issues

• PERF: Use proj_clone to create CRS in new threads

  enhancement
  pyproj4/pyproj#1654 · Filter by author snowman2 opened on Oct 8, 2026 · 3.9.0

• DEP: PROJ 9.8.1+

  dependencies
  pyproj4/pyproj#1653 · Filter by author snowman2 opened on Oct 8, 2026 · 3.9.0

• Forked child segfaults (SIGSEGV before exec) on macOS after the thread that imported pyproj exits

  bug
  pyproj4/pyproj#1642 · Filter by author schofieldmatthew opened on Oct 1, 2026
  1

• CRS.to_cf() writes angles in grads for CRSs defined in grads

  bug
  pyproj4/pyproj#1641 · Filter by author rmz-oz opened on Sep 30, 2026

• ENH: CRS.is_dynamic

  proposal
  pyproj4/pyproj#1636 · Filter by author snowman2 opened on Sep 8, 2026 · 4.0.0

• DEP: Python 3.12 support

  pyproj4/pyproj#1634 · Filter by author snowman2 opened on Sep 7, 2026 · 3.9.0

• Geoid undulation always calculated to be zero for version 3.7.2

  installation-issues
  pyproj4/pyproj#1593 · Filter by author ElinaKoester opened on May 8, 2026
  9

• geometry_area_perimeter limitations not documented properly

  pyproj4/pyproj#1592 · Filter by author christophfriedrich opened on Apr 29, 2026

• Add source_epoch and target_epoch parameters to Transformer.from_crs() and TransformerGroup, matching the --s_epoch and --t_epoch options in cs2cs in PROJ.

  enhancementproposal
  pyproj4/pyproj#1558 · Filter by author phaarnes opened on Dec 10, 2025 · 3.9.0
  7

• Hash/Equality contract violation

  bugproj
  pyproj4/pyproj#1548 · Filter by author T90REAL opened on Nov 12, 2025 · 3.9.0
  9

• Add a .devcontainer configuration to the repository

  proposal
  pyproj4/pyproj#1537 · Filter by author phaarnes opened on Oct 23, 2025
  2

• Cannot git commit without python3.11

  bug
  pyproj4/pyproj#1528 · Filter by author jjimenezshaw opened on Sep 12, 2025
  7

• DEP: Re-enable PyPy wheel builds

  cicdgithub_actions
  pyproj4/pyproj#1515 · Filter by author djhoese opened on Aug 6, 2025

• Pyproj conflict with another package google.protobuf.text_format

  bughelp wantedinstallation-issues
  pyproj4/pyproj#1500 · Filter by author yanghui-zhuang-ai opened on Jun 3, 2025
  4

• Randomly appearing bug with multi-threaded Transformer in versions >= 3.7.0

  bugproj
  pyproj4/pyproj#1499 · Filter by author odhondt opened on Jun 3, 2025
  19

• Vectorized geodesic area / length calculations

  proposal
  pyproj4/pyproj#1487 · Filter by author brendan-ward opened on Mar 31, 2025
  1

• DOC: WKT & coordinate systems not compatible as standalone element

  documentation
  pyproj4/pyproj#1486 · Filter by author snowman2 opened on Mar 31, 2025

• Problem downloading grids on the fly

  bugproj
  pyproj4/pyproj#1474 · Filter by author snowman2 opened on Feb 12, 2025
  5

• ENH: proj_trans_bounds_3d

  proposal
  pyproj4/pyproj#1473 · Filter by author snowman2 opened on Feb 6, 2025 · 4.0.0

• Should shapely be added as an (optional?) dependency?

  bugdependencies
  pyproj4/pyproj#1470 · Filter by author pmav99 opened on Jan 28, 2025
  1

• Bug in Transformer class when using a BoundCRS object (incorrect results)

  question
  pyproj4/pyproj#1467 · Filter by author phaarnes opened on Dec 20, 2024
  7

• Calculate area of arbitrary polygon on Earth's surface

  documentationprojproposalquestion
  pyproj4/pyproj#1401 · Filter by author jonathan-geoseer opened on May 14, 2024
  4

• Add JSON serializeability with PROJJSON?

  enhancementhelp wanted
  pyproj4/pyproj#1361 · Filter by author hobu opened on Nov 20, 2023
  7

• UserWarning: Valid PROJ data directory not found

  installation-issueswindows
  pyproj4/pyproj#1350 · Filter by author delahoussou opened on Oct 16, 2023
  17

• Functions of loxodrome or rhumb line is needed

  projproposal
  pyproj4/pyproj#1332 · Filter by author AkexStar opened on Aug 16, 2023
  6