Questions tagged [agriculture]

The science of cultivating land and rearing crops or livestock

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7
votes
1answer
423 views

Interpolating Daily Values from Monthly Grids using QGIS?

I am currently performing a bioclimatic analysis using monthly averaged climate grids. One particular calculation, Growing Degree Days, relies on daily maximum/minimum temperature and a threshold ...
5
votes
1answer
163 views

Choosing Topographic Wetness Index or Flow Accumulation raster?

What is the better raster to use qualitatively - Topographic Wetness Index or Flow Accumulation - to clearly see potential areas of surface flow/wetness across a landscape? As an example, what's "...
2
votes
3answers
2k views

Advantage of Digital Elevation Model (DEM) in Agriculture?

I have given the task to create Digital Elevation Model (DEM)'s of an agricultural area. I am programmer with Computer Science background and very new to GIS can anyone explain what is advantage of ...
2
votes
1answer
91 views

NDVI usage for ArcCollector and Crop Yield

So my question is as follows: I am a GIS tech for a large vineyard management company. Every year a real struggle of ours is getting a crop estimation (with +- %15 accuracy, company wants it to be +-%...
1
vote
2answers
687 views

Calculate NDVI image from R and NIR channels and rescale it to 0-255

I have images of plants taken in Red(R) and Near End Infrared(NIR) field, I calculate the NDVI image per pixel using the below formula, NDVI = (R-NIR)/(R+NIR) , for all pixels, I get a range ...
1
vote
1answer
78 views

Purchasing NDVI imagery for South Western England? [closed]

I am working on a project developing an application for livestock farmers where they can monitor their feed using satellite data. The main aim is to calculate the biomass of a field of grass. The ...
1
vote
1answer
150 views

Using Statistics by category in QGIS?

I use the "statistics by category" tool from QGIS to learn what grain yields I got from different combinations of scenarios like: Soil A + Hybrid A + Planting Date A = Yield n Soil B + Hybrid A + ...
1
vote
1answer
31 views

GPS coordinate of center of a grid

I am working on a project to identify weeds. I used the grid to separate the area. Each cell is marked weed or no weed. I would like to get the GPS of the center of each cell with a weed in it. Does ...
1
vote
1answer
234 views

How to collect training data for land cover classification?

I want to begin mapping various land cover such as coconut and pine. My issue is I do not have much experience in terms of collecting landuse information or analyzing satellite imagery and analysis. ...
1
vote
3answers
132 views

Learning resources for SAR images?

I would like to learn more on processing SAR images (general characteristics, pre-processing, filtering), in particular Sentinel-1, for crop monitoring (paddy rice in particular) in areas where ...
1
vote
0answers
15 views

Getting Geometry error: One or more input features have invalid geometry from QGIS

I am trying to use the "Split With Lines" tool to split a polygon layer that consists 1000+ separate objects. Geometry error: One or more input features have invalid geometry. The tool keeps ...
1
vote
1answer
17 views

Checking accuracy of supervised classification method in ArcGIS Pro

I have a question about my image classification method in ArcGIS Pro 2.4. I'm looking at a field of grain sorghum and doing a project that requires me to define certain features within the image for ...
1
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0answers
37 views

Calculate % agriculture and % forestry cover across each 10km square of the UK

I am working on investigating the relationship between agricultural intensity and the diversity of birds. I have a shapefile of a map that splits the UK into 10km squares and for each square I need to ...
1
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0answers
28 views

Merging Features in QGIS While Avoiding Rings

I have a large grid (~1m/feature) poly shapefile I need to get into an application controller. The controller is seeing coverage, so a feature=already applied, no feature=apply. The features can have ...
1
vote
0answers
375 views

automated crop row detection

I'm trying to identify crop row automatically (or as automated as possible). So far I can identify lines using supervised classification in QGIS (semiclassificationplugin) or Ecognition, I ...
1
vote
1answer
54 views

Satellite image of agriculture land cover for some country [closed]

I am looking for a free satellite image of agriculture land cover for North Korea. Can someone guide me to any free resource. Is it available on earth Explorer, if yes, which image should I download....
1
vote
0answers
52 views

Make rectangles from agricultural field sizes (ArcGIS 10)

I got a task to do as research assistant of which im not sure how to do.. I have a layer with field polygons of agricultural fields (pretty large scale). I want to create rectangles for each field ...
0
votes
1answer
79 views

GLCM measure in an object-based classification?

I am trying to classify agricultural fields with randomForest model. I will conduct an object-based classification. To do so, in the code by Ned Horning, I provide the boundaries in a shapefile. The ...
0
votes
2answers
75 views

Availability of Frequent LiDAR Data in UK?

I am looking for LIDAR data of grasslands located all around UK with a spatial resolution of 1m and a frequency of at least once a week. I've already had a look at the Environmental Agency but their ...
0
votes
1answer
60 views

Using complex overlapping polygon in QGIS?

I'm trying to solve quite a tough analytical problem and hoping I can find a way to do it in QGIS. Basically, I have developed a map of Australia with an overlay of agricultural production by zone (...
0
votes
1answer
562 views

Sentinel-1: biomass for agriculture

How do can I calculate biomass for some agriculture by using VV and VH polarisation SAR images? I know there are some correlation for HV RADARSAT-2 to get biomass for some agriculture like corn, wheat,...
0
votes
0answers
27 views

Identifing specific plants out indexmaps (pixelgroups) and convert to .shp

I am working on a project where I have to identify a specific plant (it is toxic) in fields. I made a high resolution Orthomosaic (1,4cm7/px) and created a vegetation index where the plant I am ...
-2
votes
1answer
452 views

Open source remote sensing and satellite imagery DATA [closed]

What are the most known libraries of open source data related to remote sensing and satellite imagery? Especially applicated to agriculture? And what are their resolutions and frequencies?
-3
votes
1answer
390 views

Latitude and longitude information of agricultural land [closed]

Is there a method by which I can get latlong details of agricultural land? Latlong information of 1 point in the land is not useful, as I want details of the entire agriculture boundary (from latlong ...