Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [solar-radiation]

radiant energy emitted by the sun, particularly electromagnetic energy.

0
votes
0answers
27 views

Solar Insolation Product with highest spatial resolution

My objective is to compare gis derived Solar Insolation against remotely sensed one. However modis has far coarser resolution then required. Is there any other product released? The site is in ...
2
votes
1answer
47 views

Calculating mean DNI (Direct Normal Irradiance) for bird species in QGIS

I am new to GIS so excuse my lack of proper terminology. What I would like to do is to calculate a mean DNI (direct normal irradiance) for multiple bird species. I do find a DNI-raster online (https:/...
0
votes
1answer
81 views

Displaying hdf5 file at correct location?

I have downloaded the INSAT-K1 VHR INSOLATION PRODUCT (https://mosdac.gov.in/catalog/doi/36). This is satellite data in hdf5 format. When I display the raster in either ArcGIS or QGIS it appears at ...
1
vote
1answer
72 views

What layers are produced by SAGA Potential Incoming Solar Radiation?

I estimated the Potential Incoming Solar Radiation in SAGA. The tool creates a file "direct insolation" and "diffuse insolation". When I export these files as .tif, a layerstack of 3 raster layers is ...
1
vote
1answer
159 views

Solar radiation analysis in ArcGIS (shade)?

I was wondering whether the Area solar radiation tool in ArcGIS takes into account the effect of shadow by the topographic surrounding terrain. Besides, is there a way to undo this effect, so I can ...
0
votes
2answers
101 views

Angle conversion for azimuth angle due east counter clockwise to due south clockwise

Suppose a given azimuth angle is calculated due east counter clockwise (ccw), and I want to convert it to due north clockwise, so I found the following formula, # limit the range to 0..360: r....
0
votes
0answers
37 views

Solar Angle of Incidence calculation

I want to calculculate the angle of incidence for the following parameters, latitude = 0.86421553 solar time = 7.85 slope = 10 deg aspect = 180 deg (N = 0, clockwise) date = 22/12/2018 Which ...
-1
votes
1answer
53 views

Solar angle of Incident calculation confusion! [closed]

How can I deal with an angle of incidence with greater than 90 degree values if I am calculating solar radiation?
2
votes
1answer
600 views

WorldClim 2.0 Solar Radiation data

I am trying to get Solar Radiation data from WorldClim version 2.0 in R, However, I am using the library raster in R but it seems to not be possible to download this data. (since there is only ...
1
vote
0answers
185 views

How to properly calculate annual irradiance using QGIS

I want to calculate annual irradiance for a couple of buildings to establish how much PV energy can be potentially harvested. Which algorithm You recommend for this purpose: "r.sun" from GRASS ...
8
votes
3answers
1k views

How to calculate total PV potential of a roof using QGIS?

I want to calculate total PV potential of a roofs in a certain area. To do that I made a dsm, ran SAGA "Potential Incoming Solar Radiation" algorithm (just playing with it only for now - I need to ...
12
votes
1answer
549 views

Irradiance analysis - GRASS vs SAGA significant discrepancies

I wanted to calculate and visualize the irradiance values for a plot. Do not know why, but in my copy of QGIS 2.18.5 I am missing appropriate SAGA module in the "Terrain Analysis -> Lightning", so I ...
1
vote
2answers
106 views

weighted sum overlay of raster layers (Wind resource map and GHI Map)

I want to generate an output raster map which indicates the areas of wind and solar energy potentials. My study area is India. I have created GHI (Global Horizontal Irradiance) raster map (by ...
1
vote
0answers
322 views

GRASS r.sun (in QGIS) computes higher radiation in winter

I am using a 1m DEM layer (Poland CS92, ETRS:2180). From this DEM I've computed Aspect and Slope in QGIS through grass plugins. I did a test run for 15th day of the year and 165th day of the year. The ...
-1
votes
1answer
159 views

solar potential analysis of 3d city model [closed]

I am looking for a free application/tool/plug-in to conduct solar potential/irradiation analysis on a 3D city model. My intention is to know how much solar energy is delivered onto the rooftops and ...
9
votes
2answers
367 views

Using postgis to generate building shades

I am currently working on a solar potential estimation tool for existing buildings. The idea is to use buildings (=Polygon) shape, their height, and create the resulting shade at a given hour. I am ...
1
vote
0answers
126 views

Solar Calculation and Projection in ArcGIS Pro on all buildings?

I am using this example to my project: http://solutions.arcgis.com/local-government/help/solar-radiation-maps/get-started/explore-solar-radiation/ I have a layer of 3D Buildings as shown in the ...
0
votes
1answer
206 views

Cleaning up a raster

I recently completed a project that involved slope, aspect, and solar radiation to find optimal rooftop locations for solar panel installations. For my final map I combined the rasters that showed the ...
3
votes
0answers
308 views

Solar radiation analysis with ArcGIS Desktop 10.4 [closed]

I'm not an expert in GIS, I learnt it recently, and I'm trying to improve my skills. I'm trying to calculate the loss of solar radiation at a specific point due to surrounding topography. I'm ...
4
votes
1answer
445 views

Is there an analog to ArcGIS Area Solar Radiation in R?

Is there a function in R to compute direct, diffuse, and global insolation based of DEM in R similar to Area Solar Radiation tool in ArcGIS?
1
vote
0answers
97 views

Point Solar Radiation Computation using ArcPy?

I want to use ArcGIS Point Solar Radiation tool to compute the solar radiation for more than 1000 data points. The table for the shapefile point data looks like this: Hour represent the time of ...
1
vote
0answers
125 views

How to calculate receiving shadow?

Using the Cesium library, I want to find shadows that objects fall onto each other. With Cesium, I can create shadows of objects, but I have no idea how to get the shadows that fall on objects. How ...
1
vote
0answers
127 views

Using ArcGIS Area Solar Radiation tool?

I tried using the tool multiple times and my result values should be around 2000-3000 W/m2/d. However my results reach up to 6000 W/m2/d. I am using a raster with cell size 30 meters and WGS 1984 ...
1
vote
0answers
112 views

Calculating sun's azimuth angle for lat/long points in ArcMap or any other software

I am working on Solar project and I was just wondering if I could calculate sun azimuth angle for a location point shapefile in ArcGIS on any other software. Are there any good detailed tutorials for ...
11
votes
3answers
867 views

Calculating sunrise/sunset time while considering topography

I want to calculate the sunrise and sunset times for a full year for a given location taking topography into account. Perhaps sunrise/sunset are not the right terms, but what I want is the time at ...
1
vote
1answer
103 views

Solar Radiation calculation for LGM

I'm trying to calculate the area solar radiation for the Last Glacial Maximum using ArcGIS 10.3. However, this seems not to be planned by Esri's Developers. Which option should I choose for the Time ...
1
vote
0answers
125 views

Arcgis area solar calculation low value issue [closed]

The output from the arcgis area solar radiation tool for my DEM looks unrealistically low for instantaneous calculation. Here is the example 12PM and 6PM respectively. The parameters for the run can ...
3
votes
1answer
552 views

Differences between mWm-2sr-1(cm-1)-1 and W/m^2 * sr * um

I'm confused about the use of this quantity. For example eumetsat on pag. 16 radiance is equal to: Physical Units = Cal_Offset + (Cal_Slope x Level 1.5 Pixel Count) expressed in mWm-2 sr-1 (cm-1)...
2
votes
1answer
92 views

How the year affects Area Solar Radiation? [closed]

How choosing a different year in "Area Solar Radiation" affects the calculation of the radiation? I understand that months change some parameters in the calculation formulas, but what about the year? ...
2
votes
1answer
122 views

Check if night hours (TimeWithinDay; AreaSolarRadiation)

I am creating a script that uses AreaSolarRadiation. Currently arcpy gives a cryptic error during the night hours. arcgisscripting.ExecuteError: ERROR 999999: Error executing function. Failed to ...
2
votes
2answers
413 views

How to merge vector buildings height layer with raster DEM to get solar maps in r.sun in Grass GIS?

Welcome, this is my first post. I have vector layer with buildings heights and vector/raster DEM file. I need to create solar maps with sun radiance values on the roof (and on surface, ofc). I am ...
0
votes
0answers
224 views

Reducing cell size of DEM for processing reasons?

I need to calculate the solar radiation for a region of interest, and I am using the 'solar radiation' tool implemented in ArcGIS (10.1) and a DEM with cell size 1x1. It is 3 days now that ArcGIS is ...
3
votes
0answers
304 views

From Landsat spectral radiance (W/m2*sr*µm) to Global horizontal irradiance (W/m2)? [closed]

We are working in a solar energy project to locate potential sites for solar panel farms. We are using the Landsat 7 panchromatic band to derive radiance with GRASS using i.landsat.toar (W/m2*sr*µm ...
1
vote
3answers
160 views

Solar potential or irradiation GIS data for India

I am looking for solar irradiation data for India in a gis format. Like the ones on the link below: http://www.arcgis.com/apps/OnePane/basicviewer/index.html?appid=bf886ca471a54e2c9127a54f60d4ca27
0
votes
0answers
170 views

solar radiation r.sun

I have a dsm and dem for an area. When I try to run r.sun module to calculate solar radiation I receive this error message in the picture. This problem does not occour when I don input slope and ...
1
vote
2answers
535 views

Multiprocessing with arcpy and Solar Analyst (spatial analyst)

I need help getting multiprocessing to work with the spatial analyst tool - Solar Analyst. I have tested the multiprocessing bit and it works fine. This sample is passing it a file containing 2 lines ...
1
vote
1answer
128 views

How to make sense of multi-band global radiation output raster from area solar radiation tool [closed]

So I'm running the area solar radiation tool using the time configuration and other parameters as seen here: By selecting the "Create outputs for each interval" checkbox, the global radiation ...
4
votes
1answer
296 views

ArcGIS Solar Radiation Tool - How is Local Solar Time/Local Time handled as input to the “within-day” time configuration?

I am scripting hourly interval runs of the Area Solar Radiation Tool, and need a hand understanding how to account for Local Solar Time (LST) versus Local Time (LT) within the tool. First off, I ...
0
votes
1answer
176 views

Solar radiation modelling on vertical surfaces

Are there any methods to measure solar radiation on vertical building facades using Esri's Solar Analyst?
3
votes
1answer
490 views

Time required to get results by solar radiation tool?

How much does time does the ArcGIS solar radiation tool take to give solar map for day of about 50 km area?
1
vote
0answers
256 views

ArcGIS Solar Radiation tool says output global radiation raster empty? [closed]

I am using ArcGIS 10 with windows7 64 bit on core i7 processor I am working with ArcMap 10 solar radiation tool to create the area solar radiation map. Every time I run the tool it stops after some ...
1
vote
1answer
1k views

Calculating area of solar radiation using ArcGIS for Desktop?

How can I obtain area solar radiation using ArcGIS for Desktop? I am open to any kind of suggestion as I want to give it a try.
10
votes
2answers
991 views

Calculate potential of solar radiation on rooftops (without LiDAR data)

I'm trying to calculate the solar radiation for rooftops, but I have a big problem, I don't have LIDAR data. I need to give the buildings the information of height. I've tried to do these, but for a ...
5
votes
1answer
613 views

Understanding the TimeWholeYear configuration in ArcGIS Area Solar Radiation

I am a bit confused with the interpretation of my results and it would be great to have some clarification! I used the TimeWholeYear configuration (without choosing the {each-interval} option, so the ...
1
vote
1answer
348 views

Describing weather data in ArcMap area solar radiation analysis

I am writing up the methodology of the analysis I did on solar radiation availability for a city. I used the tool 'area solar radiation' with ArcMap 10, using the time configuration 'TimeWholeYear(...
5
votes
2answers
1k views

Solar radiation calculation gives Background processing has encountered serious error and is unable to continue?

I have tried to calculate solar radiation (whole year with monthly interval) for Portugal from an ESRI grid (27m DEM) in Arcgis10. It seems to work, however it takes much more than a week and in the ...
3
votes
1answer
1k views

Solar radiation calculation from GTOP030 DEM image

Can you help me to calculate solar radiation from GTOPO30 DEM image at the 30 m spatial resolution. I've tried to do this many times using spatial analysis solar radiation calculation tool in ArcGIS....