Input · Files

Geo Reader

Reads a map file with its geometry: GeoJSON, Shapefile (also zipped), GeoPackage, GML, KML/KMZ, GPX, FlatGeobuf or MapInfo TAB. For a file with several layers, you pick which layer to read.

Also known as: Shapefile, GeoPackage, KML

How it works

Add the file from Add data source → File; a drone reads it with GDAL. When the file has more than one layer (GeoPackage, GML, KML folders), Layer lets you pick one; otherwise the first layer is read. Geometry column names the column the geometry is read under (blank keeps GDAL's name, geom) and Reproject to takes an EPSG code to read the geometry in, blank keeping the file's own CRS. The drone reports the CRS of what it read and counts coordinates that fall out of range or on Null Island, and those counts appear as warnings on the node.

Inputs and outputs

Settings

Example

A city.gpkg with the layers districts and roads, stored in a national projection. Pick districts in Layer and set Reproject to EPSG:4326 so the Map tab and a Spatial Join with lon/lat points both work without a separate Reproject step.

More in Files

• CSV Reader — Reads a CSV or other delimited text file, such as a TSV. Column types are detected for you, and you can override them or read every column as text.
• Fixed-width Reader — Reads a text file whose columns sit at fixed character positions, such as a mainframe export or a legacy feed, slicing each line at the positions you set on a ruler over the file's first lines. Header row, start line, encoding and row limit work as in the CSV Reader.
• JSON Reader — Reads a .json, .jsonl or .ndjson file as a table. A JSON array of objects and one-object-per-line files are both detected automatically.
• Parquet Reader — Reads a Parquet file and keeps the column types stored in it.
• Excel Reader — Reads one worksheet of an Excel workbook, the first sheet unless you pick another.
• XML Reader — Reads an XML file into a table. It finds the repeating record element for you, so each record becomes a row.
• SQLite Reader — Reads one table from a local SQLite database file (.sqlite, .sqlite3 or .db). You pick the table from the file's list of tables.
• Daedalus Table Reader — Reads a .ddtable file saved by Write Daedalus Table, in this project or another one. The column formats come back too, so everything prints as it did.