Maptor

IRI.Maptor.Core.Persistence

NuGet Target

Persistence abstractions for the Maptor GIS stack. Defines the data-source interfaces and base types that concrete adapters (SQL Server, PostgreSQL, SQLite, personal GDB, web API) implement in the IRI.Maptor.Infrastructure.* packages, and ships ready-to-use in-memory and file-backed data sources.

Installation

dotnet add package IRI.Maptor.Core.Persistence

Features

  • Core abstractions: IDataSource, IVectorDataSource (async feature queries by bounding box, geometry, or map scale), IEditableVectorDataSource, IRasterDataSource
  • Base implementations: BaseDataSource, VectorDataSource, RasterDataSource
  • In-memory vector sources built on MemoryDataSource, with file-backed variants for GeoJSON, shapefile, GPX, KML/KMZ, DXF, TopoJSON, ESRI JSON, and plain text/JSON lists
  • Raster sources: image pyramids (plain and zipped) and online/offline Google-style tile sources
  • Scale-dependent data sources that switch content by map scale (MemoryScaleDependentDataSource)
  • ConnectedFeatureSet model and the DataSourceType enum of supported backends

Usage

Load a GeoJSON file as an editable in-memory data source:

using IRI.Maptor.Core.Persistence.DataSources;

var source = await GeoJsonDataSource.CreateFromFileAsync(
    "parcels.geojson", isLongitudeFirst: true, sourceSrid: 4326);

var featureSet = await source.GetAsFeatureSetAsync();

Query any vector source through the shared abstraction:

using IRI.Maptor.Core.Persistence.Abstractions;

async Task PrintCountAsync(IVectorDataSource source, BoundingBox extent)
{
    var features = await source.GetAsFeatureSetAsync(extent);
    Console.WriteLine(features.Features.Count);
}

Dependencies

  • IRI.Maptor.Core.Common, IRI.Maptor.Core.Spatial, IRI.Maptor.Core.SpatialReferenceSystem
  • IRI.Maptor.Core.Ogc, IRI.Maptor.Core.ShapefileFormat (file-backed data sources)

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