====== Environment Variables ======

Dinamica EGO 5 has the option to configure some environment variables in order to provide some configuration customization. Below, it is provided the environment names with their respectively meaning:

^ Variable Name ^ Description ^
| DINAMICA_EGO_5_ALTERNATIVE_PATH_FOR_R | Configure an alternative pathway to the R executable RScript. |
| DINAMICA_EGO_5_R_CRAN_MIRROR | Configure the server which is better for you get the R packages. |
| DINAMICA_EGO_5_TEMP_DIR | Configure an alternative pathway that will store the temporary folder and files created into Dinamica's session. |
| DINAMICA_EGO_5_GDAL_TOOLS | Configure an alternative pathway to the GDAL utilities ('gdal_rasterize', 'gdal_translate' and 'gdalwarp') requested by Dinamica. The utilities are used by [[transform_map|Transform Map]] and [[rasterize_shape|Rasterize Shape]] functors |
| DINAMICA_EGO_5_GDAL_TOOLS_DATA | Configure an alternative pathway to the Data requested by GDAL utilities. |
| DINAMICA_EGO_5_GDAL_DATA | Configure an alternative pathway to the GDAL Data requested internally by Dinamica. |
| DINAMICA_EGO_5_MEMORY_ALLOCATION_POLICY | Configure the behavior of Memory Allocation. |

There is 4 possible Memory Allocation Policy, which are:

^ Memory Allocation Policy ^ Behavior value ^
| PREFER_MEMORY: Give allocation priority to memory (RAM) usage, without any control of quantity free memory available in the system. | 0 |
| BALANCED: Try to keep a balanced level between memory usage allocation and the quantity free memory available in the system. | 1 |
| PREFER_DISK: Give allocation priority to disk (HD) usage and try to keep as many as possible free memory in the system. | 2 |
| MEMORY_ONLY: Use only memory to allocate the maps, and report an error if there is no sufficient available free memory in the system. | 3 |

===== Environment variable Access =====
 
==== Windows 10 ====
Follow these steps in order to access environment variables:

  * Go into Settings and click on System.
  * Then on the left side click About and select System info at the bottom.
  * In the new Control Panel window that opens, click Advanced system settings on the left.
  * Now in the new window that comes up, select Environment Variables... at the bottom.
  * Then you will see the environment variables of user and system, and then you will be able to manipulate then, according your user access.
  * After manipulation, you have to re-open Dinamica to environment changes be applied.

==== Linux ====
Linux has a different way to set environment variables. You find [[https://help.ubuntu.com/community/EnvironmentVariables|here]] the fully documentation about environment variables in ubuntu, that is similar in other Linux distributions.
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