Forest and Carbon Change Tool

  • Objective: Learn how to compute forest cover, forest loss, above and below ground biomass and emissions from deforestation in raster format and tabular outputs with areas estimated.
  • ** Muda uliotarajiwa wa kukamilika **: dakika 20
  • ** Upatikanaji wa Intaneti **: Inahitajika

Compute and download forest and biomass data

  1. Select the Calculate icon (iconCalculator) from the Trends.Earth plugin in QGIS.
../_images/ldmt_toolbar_highlight_calculate.png
  1. The Calculate Indicators menu will open. In that window, click on Calculate Calculate carbon change spatial layers button.
../_images/calc_ind.png
  1. A window will appear with two steps: Step 1 is to Calculate carbon change spatial layers, and Step 2 is to Calculate carbon change summary table for boundary. Step 1 will be addressed first. If the user has already completed this process, skip to step 14 in the guide.
../_images/calc_carbon.png
  1. After selecting Step 1, the user will fill out the desired parameters in the Forest Definition tab.
../_images/forest_def.png
  1. Next, select the desired aboveground biomass dataset and the method for calculating the root to shoot ratio.
../_images/carbon_method.png
  1. In the Area tab define the area of analysis. There are two options:
  • Tumia mipaka ya nchi na mipaka ya nchi: Ikiwa unataka kutumia chaguo hili hakikisha ** chaguo la eneo la Utawala ** linaelezwa, kisha uchagua Ngazi ya Kwanza (nchi) au Ngazi ya Pili (hali au jimbo kulingana na nchi).

Note

Mipaka ya Natural Earth Administrative Boundaries iliyotolewa katika Mwelekeo.Earth iko katika public domain. Mipaka na majina yaliyotumiwa, na majarida yaliyotumiwa, katika Mwelekeo.Kuanzia haimaanishi kupitishwa rasmi au kukubalika na Conservation International Foundation, au kwa mashirika yake ya washirika na wafadhili.

Ikiwa unatumia Mwelekeo.Kuanzia kwa madhumuni rasmi, inashauriwa kuwa watumiaji kuchagua mipaka rasmi iliyotolewa na ofisi iliyochaguliwa ya nchi yao.

  • Tumia faili yako ya eneo: Ikiwa unataka kutumia eneo lako la uchambuzi, hakikisha ** Eneo kutoka kwa faili ** chaguo linaonyeshwa. Kisha bonyeza ** Vinjari ** na uende kwenye folda kwenye kompyuta yako ambapo una faili iliyohifadhiwa.

Ukichagua eneo ambalo unataka kuhesabu viashiria, bonyeza ** Next **.

../_images/area_uganda1.png
  1. Katika kitambulisho ** Chaguzi ** unaweza kufafanua ** Jina la Task ** na kufanya baadhi ya ** Vidokezo ** kutambua uchambuzi unaoendesha. Maelezo gani ambayo yanaonyesha ni ya hiari, lakini tunapendekeza kutaja:
  • Eneo la uchambuzi
  • Tarehe
  • Indicators run
../_images/options.png
  1. When done, click Calculate and the task will be submitted to Google Earth Engine for calculations. You will notice that the Calculate Change in Total Carbon window will disappear and you will be brought back to QGIS.
  2. A light blue bar will temporarily show, indicating that the task was successfully submitted. The analysis will be run in Google servers and could take between 5 and 15 minutes depending on the size of the study area (larger areas tend to take longer).
../_images/submit_carbon.png

Note

Refer to the Hali ya Task & download tutorial for detailed information on how to check the status of the tasks submitted and for downloading results from Trends.Earth.

../_images/ldmt_toolbar_highlight_tasks.png

10. To view the Google Earth Engine (GEE) tasks you have running, and to download your results, select the cloud with the arrow facing down icon (iconCloudDownload). This will open up the Download results from Earth Engine dialog box. Select Refresh list to show the task.

../_images/running1.png
  1. The task will state: RUNNING under the Status column if it is still processing. When the task is complete, it will say FINISHED after selecting Refresh List again.
../_images/finished.png

Once the task is FINSHED running, highlight the completed task and select Download Results. Save the task.

../_images/save.png
  1. You will see a message indicating the task is downloading. Once it is complete there will be a Total carbon (2000, tonnes per ha) and Forest loss (2000 to 2017) outputs in the QGIS window.
../_images/download.png ../_images/total_carbon.png ../_images/forest_loss.png

If you want, you can add some context information (e.g. country boundaries, roads, and main cities). Refer to the Weka matokeo na karatasi tutorial for detailed information on loading a basemap.

Compute summary table

  1. Select the Calculate icon (iconCalculator) from the Trends.Earth plugin in QGIS.
../_images/ldmt_toolbar_highlight_calculate.png
  1. The Calculate Indicators menu will open. In that window, click on Calculate Calculate carbon change spatial layers button.
../_images/calc_ind.png
  1. Select Step 2: Calculate carbon change summary table for boundary.
../_images/carbon_change.png
  1. Within the Input tab, select an output folder and file name.
../_images/input1.png
  1. Within the Output tab, select Browse to list an output folder and file name.
../_images/output1.png
  1. In the Area tab define the area of analysis. There are two options:
  • Tumia mipaka ya nchi na mipaka ya nchi: Ikiwa unataka kutumia chaguo hili hakikisha ** chaguo la eneo la Utawala ** linaelezwa, kisha uchagua Ngazi ya Kwanza (nchi) au Ngazi ya Pili (hali au jimbo kulingana na nchi).
  • Tumia faili yako ya eneo: Ikiwa unataka kutumia eneo lako la uchambuzi, hakikisha ** Eneo kutoka kwa faili ** chaguo linaonyeshwa. Kisha bonyeza ** Vinjari ** na uende kwenye folda kwenye kompyuta yako ambapo una faili iliyohifadhiwa.

Ukichagua eneo ambalo unataka kuhesabu viashiria, bonyeza ** Next **.

../_images/area_uganda1.png
  1. Katika kitambulisho ** Chaguzi ** unaweza kufafanua ** Jina la Task ** na kufanya baadhi ya ** Vidokezo ** kutambua uchambuzi unaoendesha. Maelezo gani ambayo yanaonyesha ni ya hiari, lakini tunapendekeza kutaja:
  • Eneo la uchambuzi
  • Tarehe
  • Indicators run
../_images/uganda_carbon_change.png
  1. When done, click Calculate and the task will be submitted to your computer locally. You will notice that the Calculate carbon change summary table for boundary window will disappear and you will be brought back to QGIS. A light blue bar will appear in the QGIS window. This is running locally on your computer. DO NOT select x or Cancel until the task is finished!
../_images/summary_submit.png
  1. A window will appear when the summary is complete. Select OK.
../_images/success.png
  1. If an error window appears, select the Yes and the summary will proceed to open.
../_images/error.png
  1. The summary table will appear.
../_images/summary_table.png