Questions tagged [resolution]

Resolution is a measure of the smallest unit or sample in data that can be distinguished from any other, and/or the number of samples for a given unit.

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62 views

Why are electric power lines so highly visible in satellite images? [closed]

In Google Maps, why are electric power lines so highly visible? I can find them every place in the United States that has above-ground power. For example, in the Google Maps image below, the high ...
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37 views

Getting pixel size without opening raster using Python [closed]

I want to get the pixel size (resolution) of a raster without opening up the raster in gdal. I currently have my script opening the raster in GDAL using gdal.Open() and getting the resolution that way....
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Which resolution is appropriate for resampling a raster in a specific CRS in QGIS 3.6? [closed]

I'm trying to resample a raster file to obtain smooth interpolated levels in EPSG:3120 - Pulkovo 1942(58) / Poland zone I projection. (following the steps in this answer) 1. Using the raster ...
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1answer
88 views

Merging rasters orthophoto overlapped with different resolutions using QGIS

I use 2 rasters orthophotos .TIFF : 1) the low resolution covering a large area. 2) the high resolution covering a small area and using an alpha band around the point of interest. My aim is to merge ...
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40 views

Using fine-resolution samples to extract from coarser-resolution efficiently in R

I have a raster stack that I want to extract from: raster resolution: 0.0417, 0.0417 (x, y). My raster is coarser than my coordinates for extraction. I have finer coordinates whose resolution is ~ ...
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34 views

Consequences of projecting in different resolution rasters

I have used 2.5 resolution enviromental rasters to build a model using ENMeval. Which are the consequences of projecting (ENMeval::maxnet.predictRaster function) a choosen model in the same area in a ...
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26 views

Merge raster tiles with different resolution and keep original resolution using Python

Problem I have two raster images with different size and resolution, which are overlapping and which I'd like to merge. The smaller image has a higher resolution which I want to merge into the larger ...
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1answer
41 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 ...
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10 views

How to select swath and spatial resolution for Resourcesat 2 Liss 4 data?

I want to use Liss 4 data of Resourcesat 2 which has spatial resolution of 5.8 m. In the ISRO web portal UOPS there are three options for Liss 4: Liss 4 Mono, Liss 4 MX70 and Liss 4 MX23. According to ...
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Comparing Slope among various DEM resolutions?

I'm comparing the slope products derived from DEMs of various spatial resolutions (1m, 10m, 30m) for a set area. The trend I find is that as the resolution improves, the areal extent of various ...
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Seeking high resolution real-color (RGB imagery) dataset?

Specifically interested in the the South Florida region, USA. The aim is to pull up high quality aerials to detect manholes and wellheads from space! These things can typically be half a foot to a ...
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Hillshade not displaying correctly in ArcGIS Pro?

I have a large DEM of England that I have clipped to my study area and have been trying to generate a hillshade from. I tried a few variations with the parameters in altitude and azimuth (leaving z =1)...
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60 views

GEE- Bad resolution when Exporting Image from Sentinel 2

I'm trying to export Sentinel2 Image but I get it with bad resolution- this is how it looks on google earth engine platform- and this is how it looks after export it- beside the resolution decrease,...
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312 views

Increase the resolution of Google Earth Engine images

I am trying to fetch high quality images from Google Earth Engine. I want to understand the relationship between zoom_level option in: Map.centerObject(image, zoom_level); and scale option in below ...
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1answer
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Count points belonging to a country but outside of country polygon (coastal)

I'm still getting my head around GIS and am using QGIS 3.6.2. I'd like to do a simple count of points within countries. The problem is that many of my points are located on coastlines or islands, so ...
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Resolution issue with NAIP data

I have loaded a NAIP tile for a small area in VA to QGIS, and compared it to the ESRI satellite imagery I already have. I'd like to use NAIP but the resolution when I drill down to individual features ...
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Calculating new raster metrics without polygonizing in R?

I have an enormous number of large rasters representing tree canopies. Every individual canopy has a unique number that is assigned to each pixel that is part of the tree. I am working with R and the ...
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0answers
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Resolution/displaying issue with legend item in QGIS

I'm having an issue in QGIS print composer. I am using QGIS 2.18. Some of my legend items are displayed in low resolution or are partially cut off. The strange thing is that some groups of the legend ...
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1answer
34 views

High-resolution, hyperspectral satellite imaging?

I am hoping to expand my (biology-focused) research to include satellite data. For this, I'd need satellite imaging that includes multiple values in the visible spectrum (specifically, above 490nm) ...
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102 views

Problem with WMS/WMTS Layer Image Quality in QGIS

I have been using an aerial provided by the state. I add the layer as a WMS/WMTS. Typically the quality is on-par with the resolution depicted in the online hosted mapping program (GeoWeb). However, ...
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21 views

Assessing mapping accuracy of a DEM with different resolutions

I am mapping conical shaped depressions on the seafloor and would like to know at what resolution of the DEM is my mapping accuracy affected by. For example if I have a DEM of 7 metres, what does the ...
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28 views

Rasterio CLI warping multiple rasters like another raster in all minus one feature

I'm writing a bash script to warp all the rasters in a specific directory to match another raster. I'd like to warp all these rasters iteratively in to match the other raster in all was except shape ...
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459 views

Changing the spatial resolution - stacked raster in R

Want to change higher spatial resolution UAV dataset stacked in R. Used raster package to stack the individual band. Want to change the spatial resolution to 1 m. stacked_UAV <- stack(stack_list)...
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348 views

Print Openlayers WMS map with fixed scaling

I need to print a map with a fixed scale (1:500 and 1:1000) on A4. The online map is done with Openlayers, the print request is sent to QGIS Server using WMS getPrint function. I mange to get an ...
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64 views

Raster from a set of Points keeping the resolution

I have a database with some points covering the earth surface and I want to build a raster (GeoTIFF using gdal_rasterize) which mantains the same spatial resolution of the input points (so without ...
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238 views

High resolution geopdfs in Qgis 3

In Qgis 2 I used to get high resolution geopdfs form the Georefexport plugin. In Qgis 3 i can get geopdfs by using the print composer/layout. However, I can not find a way to get high resolution ...
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58 views

Disaggregating list of rasters in R?

I would like to disaggregate a list of raster files in R. I write the following code but receive an error. # Import libraries require(raster) # Setup filelist and naming convention based off infiles ...
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1answer
554 views

Cannot upscale raster with rasterio

I am trying to upscale a raster using rasterio but I don't know why my process gets killed. It can print "i am arrived here" but on the reproject() I have as terminal output: killed This is the ...
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1answer
113 views

Clip to mask layer not adhering to expected width and height following CRM and resolution changes

I am attempting to take a simple opentopo heightmap and carry out the following in QGIS 3.4.1 - Reproject to UTM 31N - Set cell size resolution to 5mtr - Clip to a shapefile polygon feature exactly ...
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102 views

Which is the View.getResolution() units? [duplicate]

In OpenLayers v5, if I have a view defined like this: var view = new View({ center: [952014.59, 5571269.68], zoom: 8 }); , trying to get its resolution doing view.getResolution() outputs 611....
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1answer
56 views

Appropriate resolution for regression analysis

I'm using ArcMap 10.3. I'm a student working on a research problem where I'm taking Landsat imagery (at 30-meters resolution) and regressing it against other datasets captured at different scales (up ...
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1answer
47 views

Kriging with variable spatial precision?

I have a data-set comprised of hydraulic conductivity estimates measured at groundwater monitoring wells, as seen here: Exact GPS coordinates are available for some wells, while for others I only ...
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0answers
40 views

Setting both spatial extent and resolution when using gdalwarp?

I would like to overlay two tiff image that orginally have different projections. One is MODIS sinusoidal and the other one is WGS84. I use gdalwarp to re-project the latter into the same projection ...
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1answer
207 views

Optimum raster tile size

I am wondering if there is an optimum raster tile size when using -t in raster2pgsql. I am setting -t auto and it creates thousands of tiles and takes hours to load. I am working with very large ...
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0answers
306 views

How to get extent from current resolution in OpenLayers 3 for printing

I need to print a map with a fixed scale of 1:500 horizontally on a A4 paper (297x210mm). The map is done with Openlayers, the print request is sent to QGIS server using WMS getPrint function. Till ...
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1answer
67 views

Origin of LandViewer DEMs?

does anyone know how DEMs that can be downloaded from LandViewer are generated? They have higher resolution than SRTM and other free sources.
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1answer
89 views

Seeking accurate WMS server for Kenya?

I am looking for an accurate Map for visualizing positional data collected in Kenya. Right now I am using EXOMAPS (https://tiles.maps.eox.at/wms), in particular, a Sentinel2 cloudless view, but I am ...
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0answers
49 views

Getting hazed figure when exporting a high resolution image in QGIS

I have a raster map made in QGIS. I am trying to export that map in .tiff format in high resolution (Somewhere around I can get a file of 300 MB). So I am exporting the image with a resolution of 960 ...
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2answers
1k views

Change the resolution and size of a raster with GDAL in Python

I am quite new to GDAL and Python but want to use it to create groundwater models in FloPy. I have a raster with rivers (roughly drawn) and a DEM raster. The resolution of the river-raster is higher ...
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1answer
235 views

GeoServer - Conversion formula between scale and resolution

I am trying to figure out what is the conversion formula between scale and resolution used by GeoServer, specifically when creating a new gridset for Tile Caching. One would expect that the conversion ...
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1answer
803 views

Are there high resolution images available for download on earthexplorer?

The problem with earth explorer GeoTiff files is, if you zoom in enough, the resolution is very fuzzy. If you want to look at your backyard, for example, that is impossible. If you use the earth ...
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1answer
88 views

MapProxy WMS Print Scale Problem

The application that I work with consumes WMS services created in Geoserver via MapProxy. I used ysld to style my layers. As long as I want just display my layers in the application, the scales that I ...
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1answer
117 views

ArcMap blurry after update from 10.4 to 10.5

I had to recently update ArcGIS from 10.4 to 10.5 because of a new license. In the new version everything looks a little "blurry". All other programs (Word, Excel etc) look fine. Even in ArcMap the ...
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2answers
180 views

What does 4.5 mm resolution mean?

this is a rather simple and trivial question, but before I contact my supervisor I want to get sure. I have a .tif image that says the resolution is 4.5 x 4.5 mm. The output of gdalinfo is: Pixel Size ...
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1answer
189 views

Changing DEM resolution when creating a slope raster? [duplicate]

I want to create a slope map using a LiDAR DEM. I think that I should use the slope tool; but I need a slope map with a 2m resolution and I'm not sure how to do that. How can I have a slope map with ...
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1answer
820 views

changing projection in R without changing resolution [closed]

I have the following code to re-project my raster data. My problem is that when I change the projection, it seems that the resolution as well as pixel values change. I want to maintain the original ...
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1answer
96 views

Changing cell size output for Proximity (Raster Distance) tool in QGIS

I am trying to create a raster layer with distance to shore that has a resolution of 1km. I've created a raster distance layer using the Raster > Analysis > Proximity (Raster Distance) tool in QGIS ...
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2answers
226 views

ArcGIS export map options

I have a problem with the "export map options" of ArcMap 10.2 There are only two parameters in the option window that are: general and format. I set high dpi at 300 but the map exported has not a good ...
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2answers
487 views

How to do better quality of texture on DEM in qgis2threejs?

I use as texture for DEM image with original resolution 4000x4000px. But when qgis2threejs creating 3D model in browser - texture looks like image with low quality. In plugin menu there is line "...
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1answer
47 views

Adjusting resolution between two raster

I have two rasters with very slightly different resolution and the same number of cells. I need to adjust the resolution from one of the rasters (Raster 1) to match the other (Raster 2). Is there a ...