# intrinsicYToLatitude

Convert from intrinsic y to latitude coordinates

## Syntax

``lat = intrinsicYToLatitude(R,yIntrinsic)``

## Description

example

````lat = intrinsicYToLatitude(R,yIntrinsic)` returns the latitude of the small circle corresponding to the y-coordinate `yIntrinsic` in the intrinsic coordinate system, based on the relationship defined by geographic raster `R`.```

## Examples

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Import elevation data [1] for a region in Colorado as an array and a `GeographicPostingsReference` object. Find the latitude corresponding to the posting points in row `91` of the array.

```[Z,R] = readgeoraster('n39_w106_3arc_v2.dt1'); lat = intrinsicYToLatitude(R,91)```
```lat = 39.9250 ```

[1] The elevation data used in this example is from the U.S. Geological Survey.

## Input Arguments

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y-coordinates in intrinsic coordinate system, specified as a numeric array. `yIntrinsic` coordinates can be outside the bounds of the raster `R`.

Data Types: `single` | `double`

## Output Arguments

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Latitude coordinates, returned as a numeric array. `lat` is the same size as `yIntrinsic`.

When a point has intrinsic y-coordinate outside the bounds of raster `R`, `lat`(k) is extrapolated outside the latitude limits. However, when a point extrapolates to a latitude beyond the poles (latitude outside the range [-90, 90] degrees), `lat`(k) is set to `NaN`. Elements of `yIntrinsic` with value `NaN` map to `NaN` in `lat`.

Data Types: `double`

## Version History

Introduced in R2013b