Questions tagged [precipitation]
Precipitation is a common climatic variable used in many GIS modeling processes
76
questions
1
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1answer
22 views
Selecting only CFSR images in Google Earth Engine with precipitation data
I am trying to create cumulative monthly composites of precipitation from CFSR data in Google Earth Engine (i.e. each image would be mm/month for each month)
However, I realised that images ending ...
2
votes
1answer
56 views
How to find out which areas are affected by flooding due to heavy rain?
I'm working on a little project to visualize affected streets of flooding due to heavy rain. I already got a DEM for my study area and filled the depressions with r.fill.dir.
Since I never worked on ...
0
votes
0answers
31 views
Is it okay to do analysis on coarse rainfall data, since the area calculations can be highly misleading
I need to find the area of different classes within the rainfall data, which will be pixel-based, and since coarser data may under and over cover the study area (image below), the area calculations ...
0
votes
0answers
14 views
Zonal statistics projected differently ArcGIS Pro 2.5
I have a fishnet of equally sized raster cells of 1/4 degree, which spans the whole world. Furthermore, I have a netCDF file containing precipitation data. I load both, the shape and the raster file, ...
1
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0answers
28 views
Bilinear resampling yields inaccurate/small values (Earth Engine)
I am trying to upscale / resample some GSMaP observations from 0.1 x 0.1 degrees to 30m. I want the resolution to match Landsat 8 so that I can perform some modeling.
But in Google Earth Engine when ...
0
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0answers
69 views
Standardized Precipitation Index with gamma function
Inspired from Climate Engine platform, I want to calculate Standardize Precipitation Index based on this paper, where each rainfall datasets are fitted to the gamma function to define the relationship ...
1
vote
1answer
56 views
Calculate daily precipitation data from hourly GSMaP over several years
I am still new to the Google Earth Engine and try to calculate the daily precipitation based on the hourly GSMaP data over a longer period of time. I know, that there are already a couple of questions ...
1
vote
1answer
92 views
Extract time-series rainfall from multiple point with date information
I would like to have a CSV file which contain a time-series of 30 minutes rainfall from last 10-days before Landslide occurs from certain (landslide) location. I used NASA GPM IMERG data for the ...
2
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0answers
44 views
Understanding NOAA/GFS0P25 dataset of Google Earth Engine scale change
I have noticed that there are a big differences between the forecasting values of the years 2018-2019 against 2020 for 'total_precipitation_surface'.
var dataset = ee.ImageCollection('NOAA/GFS0P25')
...
1
vote
1answer
64 views
Reduce image collection to get daily sum from hourly precipitation GSMaP 12:00h pm to 11:00h am
I am trying to adapt a script made available by colleagues from the GEE of the GSMaP image collection. The script obtains data (as a table) of the points of each image available in a given period and ...
-1
votes
1answer
269 views
Download GLDAS precipitation monthly 1 km resolution data by Earth-engine
Does anyone know how can I get GLDAS precipitation monthly 1 km resolution data by Earth-engine? Or maybe Earth-engine just process annual precipitation data by 0.25 degrees GLDAS product?
Where is an ...
0
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0answers
33 views
High Resolution Monthly or Annual Precipitation data for four corner states or the Navajo Nation
I was wondering if anyone on here might know where I can find 30 meter resolution Average Annual or Average Monthly Precipitation data, that would cover the 4 corners area (UT, AZ, NM, CO) or ...
0
votes
2answers
22 views
What is the time interval for daily GPM IMERG product? 0:00 to 23:59 local time? UTC?
I'm processing a bunch of GPM IMERG Daily products and comparing to historical station data. These old met stations report daily precip from 9am to 9am of the following day. So I'm wandering what is ...
2
votes
1answer
337 views
Google Earth Engine: precipitation data, summing monthly data is not matching annual sum
In essence, I used GRIDMET to pull both monthly and annual precip over the same area, same time, and same database, but summing each month for the same water year is not matching:
NEW NOTE: As ...
1
vote
3answers
59 views
Rainfall interpolation using ArcMap
I have a layer that describe rainfall for 10 years. Now I want to interpolate the area in ArcGIS Desktop (ArcMap) 10.7. As you know I should define some point on my area to extract the rainfall from ...
0
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0answers
27 views
Monthly evaporation and temperature reports
Actually I found monthly precipitation report from here:
https://disc.gsfc.nasa.gov/datasets/TRMM_3B43_7/summary
If you search TRMM you can find many dataset and I've chosen TRMM 3B43.
But for ...
1
vote
1answer
45 views
Using IDW tool in ArcGIS Desktop
In ArcGIS Desktop 10.7 we have IDW tool, but when you want to work with it you should need two layers such as : Some points and a closed polyline (Boundary) as following:
then using IDW:
but I have ...
0
votes
2answers
264 views
Standardized Precipitation Index (SPI) equation using ArcGIS Desktop
I usually calculate monthly or 3-monthly Standardized Precipitation Index (SPI) using spreadsheet, based on daily rainfall from weather station. Attached is the spreadsheet example link.
And now I ...
0
votes
2answers
65 views
Clustering Raster Monthly Precipitation Pattern
I am looking for a way to automatically cluster the monthly rainfall data that I have like the Koppen Classification Map. I have 12 raster files of precipitation (months of Jan-Dec) of a country and I ...
0
votes
1answer
56 views
TRMM 3B42RT product has no Coordinate Reference System?
When I download TRMM precipitation product 3B42RT.2016010100.7.7day and when opening it in QGIS the raster has no CRS and is seen in another place with a smaller resolution, I already tried ...
2
votes
1answer
268 views
QGIS: Creating average of a precipitation multiple raster set?
I have a set of 12 precipitation raster layers downloaded from WorldClim, each one representing monthly precipitation data on a global scale. I've clipped all 12 layers with the area of interest. How ...
1
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0answers
373 views
Map gridded rainfall data to lat-longs and extract daily rainfall data? [closed]
My objective is to create a dataset, wherein for certain locations (lat-longs) I need to report daily rainfall from 1950 to 2017.
Rainfall data source: Indian Meteorological Department (IMD) daily ...
0
votes
1answer
75 views
WGS84 projection is invalid for aggregations
I am trying to extract the pixel value from the last image of an image collection. The problem is that when I do so, I get an error stating the following:
This is my code for extracting the pixel ...
1
vote
1answer
555 views
Google Earth Engine band did not match any bands errord
According to the dataset, there should be a band named: total_precipitation_surface. However, when I try to get data from this band I get:
> Collection.first: Error in map(ID=2019061000F000): ...
1
vote
1answer
43 views
How can I calculate the maximum sky viewing angle for every point in a DEM not covered by objects? [closed]
I am looking for areas in a city that are suited for setting up precipitation measuring stations. One constraint is, that the station has to be distant from each object at least two times the object's ...
0
votes
1answer
90 views
Moisture Stress Index - how important is seasonal influence in a deciduous forest?
I want to calculate moisture stress index for a deciduous forest using the formula from the article 'Detecting vegetation leaf water content using reflectance
in the optical domain' (Ceccato et al. ...
0
votes
0answers
233 views
Summing multiple years of rain data using Google Earth Engine?
I am trying to determine the what areas tend to get rain in a specific interval of time over multiple years. What I am doing is taking the filter date (in this case June 15th through July 15th) and ...
0
votes
1answer
44 views
Summation of multiple map layers?
What I am trying to do is to take a specific range of time (summer) over multiple years and then sum the total amount of precipitation onto a final layer.
This is the code I am working with
var ...
2
votes
0answers
39 views
Projecting a PRISM raster from NAD1983 to Albers Equal Area PCS in ArcMap: Why does my raster change position and cell size?
I want to perform zonal statistics on PRISM precipitation rasters using watershed shapefiles as my input zone features. I'm operating under the precept that I should project all my data into the same ...
1
vote
1answer
289 views
Reducing hourly rainfall data to monthly data for particular period of time and making a timeseries chart
I am working with GSMaP image collection (hourly rainfall data) in Google Earth Engine. I would like to make a script which is calculating and making a chart of sum rainfall in particular location ...
0
votes
1answer
558 views
Multi-Trend in Google Earth Engine?
I've wrote below code for visualize precipitation changes over a year with ui.chart command in two different provinces.
var persiann = ee.ImageCollection('NOAA/PERSIANN-CDR')
.filterDate('2017-01-01',...
-1
votes
1answer
50 views
How can I reduce the size of shapefile (.prj, .shx, .shp) up to 8 MB? [closed]
It is sub basin photo which I want to upload to CHRS so that I can to download satellite precipitation data (https://i.stack.imgur.com/EQt3v.jpg)
2
votes
1answer
98 views
Daily Rainfall data processing?
i have a .shp file of gridded daily rainfall data for an entire state.
How do i calculate the sum of all 365 days (each day is a field, n recorded for 450 stations) and generate a raster?
I am ...
6
votes
1answer
1k views
Reducing image collection to get daily sum from hourly precipitation and extraction of polygon data?
I'm using GSMaP image collection in Google Earth Engine, which has hourly precipitation data from 2000 to present. I have a script which helps getting mean pcp data (as a table) from polygon from each ...
8
votes
3answers
630 views
Locate wet patches using DEM
I'm searching for a way to determine the location of wet patches, after rainfall, in a DEM. By this, I mean puddles.
We are investigating the best locations to locate paths for recreational use. ...
1
vote
1answer
244 views
Average precipitation raster
I want to plot mean annual precipitation data for a region. I downloaded the precipitation dataset for 1900-2014 from University of Delaware site in netCDF format. Whenever I try to open the dataset ...
1
vote
2answers
195 views
Interpreting GLDAS 2.1 precipitation data
I am trying to use the GLDAS 2.1 3-hourly precipitation datasets available at:
The dataset is documented here:
https://hydro1.gesdisc.eosdis.nasa.gov/data/GLDAS/README_GLDAS2.pdf
The data is ...
1
vote
0answers
66 views
Defining projection for FEWS rainfall data in ArcMap? [closed]
This problem has been tackled here previously (see Manually adding spatial reference information for FEWS rainfall data in ArcMap?) but i couldnt get a solution to my problem from the thread.
I am ...
1
vote
0answers
141 views
Which format to display the gsmap downloaded data in QGIS?
Where can I download gsmap data especially for precipitation / rainfall and which format can be supported by QGIS software?
-2
votes
1answer
528 views
Acquiring and understanding data from world clim? [closed]
I am a novice and trying to get monthly precipitation data of India in raster format month wise.
The closest I got was from worldclim.org that too annual data for a block containing the Indian ...
2
votes
1answer
48 views
Storm Total Precip Map
I'm using ArcMap 10.5.
I have two individual days of precip data rasters from NOAA/NWS.
I want to combine the two days with the cumulative total storm precip displayed in a new raster.
Many of the ...
1
vote
1answer
114 views
Batch raster operations to get Maximum Precipitation in Catchment
I have information of maximum precipitation per grid cell for a certain area over 55 years, each year is a different matrix with the corresponding precipitation values. I know that I need to do the ...
1
vote
1answer
1k views
Calculating and displaying mean annual precipitation from CRU data
I'm trying to display mean annual precipitation (MAP) data from the CRU dataset (http://data.ceda.ac.uk/badc/cru/data/cru_ts/cru_ts_4.01/data/pre/) across a specific region.
The data are monthly ...
-1
votes
3answers
137 views
Daily temperature data portal globally
Is there any climatic portal for downloading historical climatic data ( Rainfall & Temperature) on a daily basis or at least on a decadal basis?
PRISM gives only for US regions.
2
votes
0answers
167 views
How to handle multiple rasters (precipitation data) in QGIS?
Currently I am working at a hydrological model for Rwanda which needs monthly precipitation data averaged over the area of subcatchments.
The precipitation data are 144 TIF's from CHIRPS for timespan ...
0
votes
1answer
1k views
Average and Annual rainfall in R? [closed]
I have rainfall data for more than 50 years in a column. I need to get total rainfall and average rainfall for each year.
How can I do it in R?
0
votes
1answer
77 views
Solving computing time problem when grid size element increases in flood model?
I want to create high resolution and high accuracy "area of inundation" map using FLO-2D Model. I have high resolution Digital Elevation Model (DEM) and I must show small topographic details on my ...
2
votes
0answers
416 views
How to download GPM rainfall data automatically?
How to download GPM rainfall data automatically?
I tried to use DownloadGPM.R Function, but I think I had problem with Axel download accelerator. I guess I need to declare Axel as environment ...
4
votes
1answer
898 views
Interpolating multiple years of daily precipitation data to generate daily time series? [duplicate]
I am trying to use ArcMap ver. 10.2 to create several models using ModelBuilder. The model will be created to:
interpolate 7 years of point measured precipitation data (long integer format at a daily ...
1
vote
0answers
103 views
ArcGis layer query: Average annual precipitation for area in U.S [closed]
I need to get average precipitation for certain land parcels. I've found several layers which could offer this information but queries do not return results or indicate error. Below is example of my ...
