Documentation for MapLib/Store.swift¶
In memory spatial data storage. After class instance destruction all data will be loose.
- static let ext = ".ngmem"¶
Memory storage description file extension.
- func createFeatureClass()¶
Create feature class in storage.
- Parameters
name – Feature class name.
geometryType – Geometry type.
epsg – Spatial reference EPSG code.
fields – Feature class fields.
options – Any other create option if form of key-value dictionary.
- Returns
FeatureClass class instance or nil.
Spatial data storage. This is geopackage file with specific additions.
- static let ext = ".ngst"
Spatial data storage file extension.
- func createFeatureClass()
Create feature class in storage.
- Parameters
name – Feature class name.
geometryType – Geometry type.
fields – Feature class fields.
options – Any other create option if form of key-value dictionary.
- Returns
FeatureClass class instance or nil.
- func createTable()¶
Create table in storage.
- Parameters
name – Table name.
fields – Table fields.
options – Any other create option if form of key-value dictionary.
- Returns
Table class instance or nil.
- enum EditOperationType¶
Edit operation type. This is enumerator of edit operation types.
NOP: No operation.
CREATE_FEATURE: Create feature/row.
CHANGE_FEATURE: Change feature/row.
DELETE_FEATURE: Delete feature/row.
DELETE_ALL_FEATURES: Delete all features.
CREATE_ATTACHMENT: Create new attachment
CHANGE_ATTACHMENT: Change attachment name and/or description
DELETE_ATTACHMENT: Delete attachment
DELETE_ALL_ATTACHMENTS: Delete all attachmetns
- struct EditOperation¶
Edit operation for logging properties.
Spatial referenced raster or image
- func cacheArea()¶
Cache tiles for some area for TMS datasource.
- Parameters
bbox – Area to cache.
zoomLevels – Zoom levels to cache.
callback – Callback function which executes periodically indicating progress.
- Returns
True on success.
Non spatial table.
- func createFeature() Feature? ¶
Create new feature/row in memory.
- Returns
New feature class instane or nil.
- func insertFeature(_ feature:Feature, logEdits: Bool = true) Bool ¶
Insert feature into table.
- Parameters
feature – Feature/row to insert.
logEdits – Log edits in history table. This log can be received using editOperations function.
- Returns
True on success.
- func updateFeature(_ feature:Feature, logEdits: Bool = true) Bool ¶
Update feature/row.
- Parameters
feature – Feature/row to update.
logEdits – Log edits in history table. This log can be received using editOperations function.
- Returns
True on success.
- func deleteFeature(id: Int64, logEdits: Bool = true) Bool ¶
Delete feature/row.
- Parameters
id – Feature/row identificator.
logEdits – Log edits in history table. This log can be received using editOperations function.
- Returns
True on success.
- func deleteFeature(feature: Feature, logEdits: Bool = true) Bool ¶
Delete feature/row.
- Parameters
feature – Feature/row to delete.
logEdits – Log edits in history table. This log can be received using editOperations function.
- Returns
True on success.
- func deleteFeatures(logEdits: Bool = true) Bool ¶
Delete all features/rows in table.
- Parameters
logEdits – Log edits in history table. This log can be received using editOperations function.
- Returns
True on success.
- func reset()¶
Reset reading features/rows.
- func getFeature(index: Int64) Feature? ¶
Get feature/row by identificator.
- Parameters
index – Feature/row
- Returns
Feature class instance or nil.
- func getFeature(remoteId: Int64) Feature? ¶
Get feature/row by remote identificator.
- Parameters
remoteId – remote identificator.
- Returns
Feature class instance or nil.
- func fieldIndexAndType(by name:String) (index: Int32, type: Field.FieldType) ¶
Search field index and type by field name.
- Parameters
name – Field name.
- Returns
Tuple with index and type. If field not exists the index will be negative and field type will be UNKNOWN.Get e
- func editOperations() [EditOperation] ¶
Get edit operations log.
- Returns
EditOperation class array. It may be empty.
- func delete(editOperation: EditOperation)¶
Delete edit operation from log.
- Parameters
editOperation – EditOperation to delete.
Spatial table.
- let geometryType : Geometry.GeometryType¶
Geometry type of feature class.
- func createOverviews()¶
Create vector overviews to speedup drawing. This is a synchronous method.
- Parameters
force – If true the previous overviews will be deleted.
zoomLevels – The list of zoom levels to generate.
callback – Callback function to show process and cancel creation if needed.
- Returns
True on success.
- func setSpatialFilter(envelope: Envelope) Bool ¶
Set spatial filter.
- Parameters
envelope – Features intesect with envelope will be returned via nextFeature.
- Returns
True on success.
- func setSpatialFilter(geometry: Geometry) Bool ¶
Set spatial filter.
- Parameters
geometry – Features intesect with geometry will be returned via nextFeature.
- Returns
True on success.
- class Field¶
FeatureClass/Table filed class.