Import Configuration

The configuration settings for the import command are divided into "importOptions" for general import settings and "readOptions" for input file settings and format-specific options.

The names and purposes of the JSON properties align closely with their counterparts in the command-line options. Where applicable, the description of each JSON property links to the command-line option for more details.

Import options

The example below illustrates the JSON structure for the import options.

{
  "importOptions": {
    "mode": "importAll",
    "indexMode": "keep",
    "failFast": false,
    "numberOfThreads": 4,
    "batchSize": 20,
    "tempDirectory": "/my/path/to/temp",
    "affineTransform": [0.0,1.0,0.0,0.0,1.0,0.0,0.0,0.0,0.0,0.0,1.0,0.0],
    "lineage": "myLineage",
    "updatingPerson": "myUpdatingUser",
    "reasonForUpdate": "myReasonForUpdate",
    "filterOptions": {...}
  }
}

General import options

Property Description Default value

"mode"

Import mode: importAll, skipExisting, deleteExisting, terminateExisting.

importAll

"mode"

Index mode: keep, drop, dropCreate.

keep

"failFast"

Fail fast on errors.

false

"numberOfThreads"

Number of threads to use for parallel processing.

"batchSize"

Number of top-level features that are committed to the database in a single transaction. A higher batch size might improve import performance but requires more memory.

20

"tempDirectory"

Store temporary files in this directory.

"affineTransform"

Transform coordinates using a 3x4 matrix in row-major order. The matrix coefficients are represented as array.

"lineage"

Lineage to use for the features.

"updatingPerson"

Name of the user responsible for the import.

database user

"reasonForUpdate"

Reason for importing the data.

Filter options

The "filterOptions" property is a container object for the following filtering options.

{
  "filterOptions": {
    "featureTypes": [ (1)
      {
        "name": "bldg:Building"
      },
      {
        "name": "Road",
        "namespace": "http://3dcitydb.org/3dcitydb/building/5.0"
      }
    ],
    "ids": ["foo","bar"],
    "bbox": {
      "coordinates": [10.0,10.0,20.0,20.0],
      "srs": { (2)
        "srid": 4326,
        "identifier": "http://www.opengis.net/def/crs/EPSG/0/4326"
      }
    },
    "bboxMode": "intersects",
    "countLimit": {
      "limit": 1000,
      "startIndex": 20
    }
  }
}
1 The "name" property is mandatory. To avoid ambiguity, use the format "prefix:name" with a namespace alias as prefix or specify the full namespace using the "namespace" property.
2 Use either "srid", "identifier", or both to define the target CRS.
Property Description Default value

"featureTypes"

Array of JSON objects specifying the features to process. Each object must include the "name" of the feature type. To avoid ambiguity, use the format "prefix:name" with a namespace alias as prefix or specify the full namespace using the "namespace" property.

"ids"

Array of identifiers defining the features to process.

"bbox"

Defines a 2D bounding box as a spatial filter using a "coordinates" array for the lower-left and upper-right corners. If the coordinates differ from the VCDB CRS, a different "srs" can be specified with "srid" or "identifier" property.

`"bboxMode"

Bounding box mode: intersects, contains, onTile.

intersects

"countLimit"

The "limit" property sets the maximum number of features to import, and the "startIndex" property defines the 0-based index of the first feature to import.

Read options

The JSON structure for storing read options is shown below. Format-specific settings are provided within the "formatOptions" container object, with the input format name used as the key for the corresponding settings.

You only need to provide format-specific options for the file formats that match your input files. 
{
  "readOptions": {
    "failFast": false,
    "numberOfThreads": 4,
    "encoding": "UTF-8",
    "tempDirectory": "/path/to/temp",
    "computeEnvelopes": true,
    "formatOptions": {
      "CityGML": {...},
      "CityJSON": {...}
    }
  }
}

General read options

Property Description Default value

"failFast"

Fail fast on errors.

false

"numberOfThreads"

Number of threads to use for parallel processing.

"encoding"

Encoding of input file(s).

"tempDirectory"

Store temporary files in this directory.

"computeEnvelopes"

Compute and overwrite extents of features.

false

CityGML options

The "CityGML" property is a container object for CityGML-specific format options.

{
  "CityGML": {
    "includeXALSource": false,
    "xslTransforms": [
      "/path/to/myFirstStylesheet.xsl",
      "/path/to/mySecondStylesheet.xsl"
    ],
    "appearanceOptions": {
      "readAppearances": true,
      "themes": ["foo","bar"]
    },
    "useLod4AsLod3": false,
    "mapLod0RoofEdge": false,
    "mapLod1MultiSurfaces": false,
    "createCityObjectRelations": true,
    "resolveCrossLodReferences": true
  }
}
Property Description Default value

"includeXALSource"

Include XML snippets of xAL address elements.

false

"xslTransforms"

An array of XSLT stylesheets to transform the input, referenced by filename and path (absolute or relative). The stylesheets are applied in the specified order.

"appearanceOptions"

The "themes" array restricts parsing of appearances based on their <theme> property. To exclude all appearances, set the "readAppearances" property to false (default: true).

"useLod4AsLod3"

Use LoD4 as LoD3, replacing an existing LoD3.

false

"mapLod0RoofEdge"

Map LoD0 roof edges onto roof surfaces.

false

"mapLod1MultiSurfaces"

Map LoD1 multi-surfaces onto generic thematic surfaces.

false

"createCityObjectRelations"

Create CityObjectRelation objects for geometry references between top-level features.

true

"resolveCrossLodReferences"

Resolves geometry references between different LoD representations of the same feature.

true

CityJSON options

The "CityJSON" property is a container object for CityJSON-specific format options.

{
  "CityJSON": {
    "mapUnsupportedTypesToGenerics": true,
    "appearanceOptions": {
      "readAppearances": true,
      "themes": ["foo","bar"]
    }
  }
}
Property Description Default value

"mapUnsupportedTypes
ToGenerics"

Map city objects from unsupported extensions onto generic city objects.

true

"appearanceOptions"

The "themes" array restricts the import of appearances based on their "theme" property. To exclude all appearances, set the "readAppearances" property to false (default: true).