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Merge pull request #2045 from Esri/jy-rvw-geom
Update hyperlink to current document of listed coordinate systems
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guide/15-working-with-geometries/part1_introduction_what_is_geometry.ipynb

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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"**Spatial reference** defines the measurement system used to locate the geometry on a model of the Earth. For people that are new to GIS, this may come as a surprise: there are several such models to represent Earth. These models are a mathematical approximations of Earth and as such, each model is designed to suit a specific purpose - such as for navigation, area calculation, large area display etc. ArcGIS supports over a [thousand such systems](https://desktop.arcgis.com/en/arcmap/latest/map/projections/pdf/geographic_coordinate_systems.pdf), called **coordinate systems** or **coordinate reference systems**.\n",
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"**Spatial reference** defines the measurement system used to locate the geometry on a model of the Earth. For people that are new to GIS, this may come as a surprise: there are several such models to represent Earth. These models are a mathematical approximations of Earth and as such, each model is designed to suit a specific purpose - such as for navigation, area calculation, large area display etc. ArcGIS supports over a [thousand such systems](https://developers.arcgis.com/rest/services-reference/enterprise/using-spatial-references/#coordinate-systems-pdfs), called **coordinate systems** or **coordinate reference systems**.\n",
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"\n",
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"When spatial data is created, it is often specified with a spatial reference in the form of a particular **coordinate system**. Most spatial references fall into one of two categories - **geographic coordinate systems** and **projected coordinate systems**. To integrate spatial data from various sources, the data must be transformed to a common coordinate system. Thus spatial reference system must be clearly defined not only to verify the integrity of geometric calculations between shapes, but also to allow transformations to take place between shapes in different coordinate systems."
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.10.14"
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"version": "3.11.0"
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},
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"toc": {
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"base_numbering": 1,

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