> For the complete documentation index, see [llms.txt](https://mims.oascities.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mims.oascities.org/geospatial-data/capabilities-and-requirements.md).

# Capabilities and Requirements

## **C1: Cities and communities can easily transfer geospatial data between internal and external (including IoT-related) IT systems**

**Requirements:**

**R1.1** Geospatial data shall be exposed through a standards-based web service interface.

## **C2: Cities and communities can integrate 2D and 3D geospatial data coming from a variety of sources, for example geodata and building information models, and share that data within and between them in an interoperable way**

**Requirements:**

**R2.1** Geospatial data shall be encoded using open standards. It is recommended to use relevant standards from OGC and BuildingSMART International.

## **C3: Cities and communities can integrate geospatial data with other data that can provide further information about the context**

**Requirements:**

**R3.1** All data sets used to provide further information about the context covered by geospatial data shall comply with MIM1 and MIM2.

## **C4: Cities and communities have a consistent and persistent way of describing individual instances of all features, things or entities included in the geospatial data sources**

**Requirements:**

**R4.1** Unique and persistent identifiers shall be used to identify particular instances of any entity used in data sets. *(See MIM1: Interlinking Data.)*

## **C5: Coordinate Reference Systems (CRS) used in data sharing are easily transformable into a common CRS**

**Requirements:**

**R5.1** Coordinate Reference Systems (CRS) shall comply with standards, and information shall be provided regarding which standard (e.g. EPSG:4326, EPSG:3857) is being used. This includes the EPSG number or WGS number, along with information about any variation based on national systems such as the Latvian LKS-92, so that data can be transformed to a common CRS. *(Note: Within the EU, for geospatial data it is required to use metadata compliant with the INSPIRE Directive, including the metadata needed to describe the CRS information.)*


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