---
title: Create a map with Raster Grid Layers
description: Once you have uploaded your GeoTIFF data to the CartoVista Server, you can use the CartoVista Publisher to create maps.
---

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# Create a map with Raster Grid Layers

## Once you have uploaded your GeoTIFF data to the CartoVista Server, you can use the CartoVista Publisher to create maps.

### Add a grid layer

The list of available Raster Grid Data is displayed under the server node in the **Server** Tabulation of the **Map Source Manager.**

![grid-layers-map-sources](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/grid-layers-map-sources.png?width=333&name=grid-layers-map-sources.png)

ℹ️   If you have no raster grid data yet on your server, you need to [Upload your Geotiff](https://knowledge.cartovista.com/manage-raster-grid-data-on-the-cartovista-server?hsLang=en) data first before creating a map.

Drag and drop the layer you want to create your map.

![map-window-with-grid-layers](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/map-window-with-grid-layers.png?width=688&name=map-window-with-grid-layers.png)

 

ℹ️    You can also right-click on your layer and select **Create a new map window**.

### Choose your layer's style and parameters

Click on the layer properties to configure the layer name, visibility and other settings.  
![grid-layers-properties](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/grid-layers-properties.png?width=558&name=grid-layers-properties.png)  
*The default blend mode for grid layer is Multiply.*

#### Colour rendering

Click on the styles tabulation to choose how to display the grid data:  
![grid-layers-styles](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/grid-layers-styles.png?width=688&name=grid-layers-styles.png)

- Choose the number of inflection points and assign a value, color and opacity for each point.
- Use the predefined color palettes to choose a color scheme:
  
  ![grid-layers-color-palette](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/grid-layers-color-palette.png?width=200&name=grid-layers-color-palette.png)
- Use the label to setup a label for the inflection point.
- Choose the rendering, either **linear** (gradient) or **discrete** (contour polygons):
- Choose the **shaded relief** option to add a relief effect to your layer:  
  ![shaded-relief-effect](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/shaded-relief-effect.png?width=572&name=shaded-relief-effect.png)
- The **Smooth rendering** option allows you to choose between smooth or sharp rendering of the pixels.

- Finally, the Load and Save Buttons can be used to save your grid layer to a file to reuse it (load).  
  The settings are saved in a JSON file that looks like this:
  
  ```
  {  "points": [    {      "value": 42,      "min": 42,      "max": 82.2,      "label": "42",      "color": "rgba(68,1,84,1)"    },    {      "value": 179.7,      "min": 162.5,      "max": 202.6,      "label": "179.7",      "color": "rgba(39,127,142,1)"    },    {      "value": 363.2,      "min": 323,      "max": 363.2,      "label": "363.1",      "color": "rgba(253,231,37,1)"    }  ],  "colorPalette": "VIRIDIS",  "calculation": "EQUAL_RANGES",  "isLinearRendering": false,  "isShadedRelief": false,  "min": 42.0400009155,  "max": 363.1499938965,  "precision": 1}
  ```

#### Arrow rendering

Choose the arrow mode for the directional grids.![style-by-arrow](https://knowledge.cartovista.com/hs-fs/hubfs/Knowledge%20Base%20Import/style-by-arrow.png?width=688&name=style-by-arrow.png)

 

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