Data Profile for This Category
Data for this category originates from the national unified construction project EIA declaration and approval system, ecological environment zoning control results, pollution discharge permit platform, and monitoring data. Update frequency is irregular. Commonly processed documents include environmental impact assessment reports or report forms, approval applications, public participation explanations, technical evaluation opinions, and EIA approval documents. These documents have clear chapter divisions, project subject information, pollution prevention measures and other standard fields. Some official documents include fixed headers, footers, and stamp areas.
Constraints on Document Parsing and Chunking
Data from multiple sources has significant format variation. Parsing workflows must support structured declaration forms, long-text reports, short-form approval documents and other document types. Irregular updates require parsing processes to quickly adapt to new official document formats. Core business fields such as project category, pollution prevention measures, and public participation status are included in documents. When chunking, field correlations must be retained to avoid splitting that breaks business logic. Fixed formats in official documents introduce irrelevant content, which must be filtered before chunking. Unfiltered content will interfere with the accuracy of subsequent retrieval and business verification.
How to Set Configurations
| Configuration Item | Recommended Value | Rationale for This Setting |
|---|---|---|
chunkSize | 800–1200 characters | Balances chunking needs for long chapters and short approval documents in EIA materials, ensuring each chunk contains a complete business unit |
chunkSplitter | Split by chapter titles | EIA documents have clear chapter divisions; splitting by titles preserves the integrity of business logic |
customPdfParse | Enabled | Filters out irrelevant content such as official headers, footers and stamp areas in EIA PDFs, improving the usability of parsed text |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Accommodates the upload requirements of large single environmental impact assessment reports, preventing interception due to oversized files |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Accommodates the parsing time required for large EIA documents, preventing interruptions due to timeout during parsing |
chunkSettingMode | Manual configuration | Adjusts chunking parameters for different types of EIA documents, adapting to differences between reports and approval documents |
Three Common Misconfigurations
- The symptom is a parsing timeout when uploading a 3 MB EIA PDF. The root cause is failure to adjust
PARSE_FILE_TIMEOUT_SECONDSto a value suitable for large documents. - The symptom is that retrieval results only return text chunks without business metadata such as the project's affiliated region and approval status. The root cause is failure to synchronize business fields bound during document upload to chunk metadata.
- The symptom is that the system rejects uploads of Excel-format EIA declaration forms. The root cause is failure to enable custom file parsing adaptation, or failure to confirm the range of file formats supported by the system.
How to Verify Correct Configuration
- Upload a standard EIA PDF, and check the parsing log in FastGPT v4.17.0 to confirm that irrelevant content such as headers and footers has been filtered.
- Upload an EIA document larger than 500 MB, and confirm that the upload and parsing processes do not display interruption errors.
- Search for keywords of a specific EIA project, and check whether returned chunks carry corresponding business metadata.
- Adjust
chunkSizeto different ranges, and verify that the length of chunked text matches the expected configuration.
The values provided here are common starting points, and should be evaluated against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.