@loaders.gl/las/dist/lib/get-las-schema.js

Framework-independent loader for the LAS and LAZ formats

import { deduceMeshSchema } from '@loaders.gl/schema';
/**
 * Gets schema from PLY header
 * @param lasHeader
 * @param metadata
 * @returns Schema
 */
export function getLASSchema(lasHeader, attributes) {
    const metadataMap = makeMetadataFromLasHeader(lasHeader);
    const schema = deduceMeshSchema(attributes, metadataMap);
    return schema;
}
/**
 * Make arrow like schema metadata by LASHeader properties
 * @param lasHeader
 * @returns
 */
export function makeMetadataFromLasHeader(lasHeader) {
    const metadata = {};
    /* eslint-disable camelcase */
    metadata.las_pointsOffset = lasHeader.pointsOffset.toString(10);
    metadata.las_pointsFormatId = lasHeader.pointsFormatId.toString(10);
    metadata.las_pointsStructSize = lasHeader.pointsStructSize.toString(10);
    metadata.las_pointsCount = lasHeader.pointsCount.toString(10);
    metadata.las_scale = JSON.stringify(lasHeader.scale);
    metadata.las_offset = JSON.stringify(lasHeader.offset);
    if (lasHeader.maxs !== undefined) {
        metadata.las_maxs = JSON.stringify(lasHeader.maxs);
    }
    if (lasHeader.mins !== undefined) {
        metadata.las_mins = JSON.stringify(lasHeader.mins);
    }
    metadata.las_totalToRead = lasHeader.totalToRead.toString(10);
    metadata.las_pointsFortotalReadmatId = lasHeader.totalRead.toString(10);
    if (lasHeader.versionAsString !== undefined) {
        metadata.las_versionAsString = lasHeader.versionAsString;
    }
    if (lasHeader.isCompressed !== undefined) {
        metadata.las_isCompressed = lasHeader.isCompressed.toString();
    }
    return metadata;
}