Migrating from the earlier documentation

Version 0.3 replaced the old SAM 1 and segment-geospatial backend with SAM 3. Scripts from the old site therefore need API updates:

Earlier documentation	Current 0.3 series
SamLidar(ckpt_path="sam_vit_h_...pth")	SamLidar() plus approved access to facebook/sam3 and HF_TOKEN or hf_token. No manual checkpoint path.
algorithm, model_type, sam_kwargs	Removed; SAM 3 is the inference backend.
model.mask.*	Use model.automatic_masks.* for automatic masks or model.text_prompt.* for prompted inference.
PinholeView(intrinsic=K, rotation=R, translation=T)	Set intrinsics, rotation, and translation on SamLidar; pass view=PinholeView() to segment.
PinholeView(interactive=True)	Interactive camera capture is unavailable. Supply matrices; see Pinhole camera guide.
labels, *_ = model.segment(...)	The first result is now point segment_ids. The second is the 2D label raster. Pinhole results also include K and pose.

Ground filtering remains optional. The writer still adds segment_id to LAS/LAZ, but a signed 32 bit field is now used so -1 can represent unlabeled points. Existing files with older field types should be handled according to their stored values rather than assumed to use this convention.

The previous site showed an AHN-4 tutorial and SAM 1 checkpoints. Those examples are historical. Top view tutorial and Pinhole camera guide are the current workflows; the old HTML URLs continue to point to updated pages.