Questions tagged [image]

A representation or description of a scene, typically produced by an optical or electronic device, such as a camera or a scanning radiometer.

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21 views

Digitize image / fantasy map without projection

I have an image where I know the distance between two points in meters (say 800). How do I import this image in QGIS (3.8) so that I get this distance when I measure with the tool in the toolbar? ...
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13 views

QGIS georeferencer distorts colours

I try to use the georeferencer to geofreference certain building plans, but the referencer really distorts colours As you can see in the picture. it hollows out what used to be solid red, black and ...
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1answer
15 views

Update image geometry from another geometry (GEE)

I have a set of images I have processed. Unfortunately, the geometry of the image processed do not always fit the image data. Problem: Let's assume I have an imageCollection. Then, when I would like ...
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0answers
18 views

QGIS automated export to image of multiple layersets

I have one project that contains layers in QGIS. Every layer is a quarterly update of my fairway showing the fairwayprofile and aids-to-navigation of the whole of my administration area. My current ...
2
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0answers
28 views

Charting Normalized Difference of Image Collection?

I would like to get the normalized difference of each image within an image collection (In this case Sentinel-2) for a specific polygon/geometry and then chart the values calculated for each image. ...
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2answers
30 views

Create kmz with coordinates from images and thumbnails for symbols

I have about 110 geotagged images and am looking for an effective way to create a .kmz which contains for each image a point based on its geotag and uses a thumbnail of the picture as symbol. Clicking ...
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2answers
94 views

Using Open Google Earth cache file in QGIS?

I have a Google Earth cache file. Is there any way to open the Google image from a cache file in QGIS 3? I had done it in standalone PC successfully. Does it works also in Mapped Network Drive also....
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17 views

How to dynamically provide input for contour thresholding in openCV

I am the following codes for getting the contours in openCV # load the image, convert it to grayscale, and blur it slightly image = cv2.imread(args["image"]) gray = cv2.cvtColor(image, cv2....
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25 views

How to pixelwise annotation with QGIS

I need to create masks with QGIS of hedgerows for satellite images (raster) segmentation. I tried with the SCP plugin but I can't use growing algorithm because I only want to keep hedgerows, not ...
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0answers
19 views

How to access BLOB file from database table published to ArcGIS REST service

I have published a query table that contains a BLOB field to ArcGIS REST and have not been able to access the images. I tried using esriRequest, but the response type that returns is text, and I think ...
2
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1answer
89 views

Compress Large size of satellite image by Open Source GIS software [closed]

I have a new challenge to compress large size of satellite image from 59GB to 10GB as maximum size by Open Source GIS software to publish it to GeoServer.
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12 views

Why the Masking in ENVI does not give different statistical result

I want to run statistical band correlation of an image in ENVI. The image has been masked with polygon of interest, and shows no-data value outside the polygon. I expected that it calculated only the ...
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0answers
70 views

Saving osgeo.gdal.Dataset as GeoTIFF or JPEG with world files using GDAL from Python?

I am trying to take a plain JPEG with no spatial references, apply ground control points (GCPs) to it, and output a georeferenced GeoTIFF or JPEG with world files. I found some code that seemed like ...
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39 views

Get a 250x250 tile around a Point in an Image

I am trying to randomly sample 250x250 pixel tiles from a big Image, let's say 40000x40000. In this case the big Image would be the Hansen Dataset. I want to sample points in which a forest loss has ...
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0answers
15 views

Downloading Aster level 1T product?

When I try to download Aster level 1T data from the USGS Earth Explorer site it asks me to enter my username and password over and over when I click on download link of my desired product. What ...
2
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2answers
127 views

Post Orthorectification error reduction?

I am trying to orthorectify an old aerial photo that has control points. When I run an output and then validate it I find some offset or distortion. What should I do to fix this? Does anyone have ...
2
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0answers
48 views

Georeferencing multiple images as GeoTIFF (same size and extents) in QGIS

I have 50 images and I want to georeference them all on to the exactly same place. They have all the exactly same size and extends. I've begun to load the same georeferencing points for every single ...
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1answer
57 views

Georeference an image by knowing two Lat/Long coordinates?

How can I georeference an unrotated image by knowing two Lat/Lng coordinates? I tried to transform the coordinates to UTM, but this didn't work (for me), because I also need to rotate it and ...
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22 views

Mapping a LinearFit to colors

Refering to EE>Examples>LinearFit (https://code.earthengine.google.com/598af3369de7a4845f0325030a66e0e1) I would like to check my understanding. On line 20 comment says: // Display trend in red/blue,...
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51 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, ...
1
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1answer
171 views

Extracting qualified image patches in Google Earth Engine?

I want to extract qualified (e.g., cloud-free) image patches (e.g. size of 128x128) in a large image (e.g. 10000x10000) in Google Earth Engine. These image patches can overlap with other qualified ...
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59 views

ODK Aggregate PostGIS and MapServer WFS with attached images

I am using ODK Collect to collect ground data. The data collected are stored into a PostgreSQL/PostGIS database then I publish them as WFS through MapServer and read them with Leaflet (Leaflet-WFST ...
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0answers
25 views

Interactive trigger for external image viewer?

Is it possible to navigate from point to point with a shortcut on the keyboard and interactively (tracking) display the embedded photos at the point locations in an external image viewer? I could do ...
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1answer
41 views

Point cloud/image comparison?

I used MATLAB software to classify point cloud data into 3 classes; (1) main; (2) protrusion and (3) recess. In MATLAB I assigned a distinctive color to each class to differentiate between classes (...
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0answers
77 views

Using .map() to display multiple images in an ImageCollection [duplicate]

How do I display multiple images from an image collection using .map()? // Create clipping function var clipper = function(image){ return image.clip(geometry); }; // Load image collection var ...
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22 views

Creation of multiple Referenced Mosaic Datasets with different names and coordinate systems

I am trying to create multiple Referenced Mosaic Datasets with different names and coordinate systems based on 1 source mosaic dataset. My code is as follows: # test referenced mosaic dataset ...
1
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1answer
124 views

How to insert multiple images in the Atlas in QGIS?

I have a layer of CROSS SECTIONS (34) and the same number of IMAGES correspondent of each section. In the cross sections layer I have a column named PHOTOS where I defined this field as "ATTACHMENTS > ...
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1answer
234 views

EE:A region must be a GeoJSON Polygon or LinearRing. Got: 'MultiPolygon'

Tried to export transition classes for a region of interest. I cant export image to drive for my selected feature collection. Getting an error after running for a while,"A region must be a GeoJSON ...
1
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1answer
176 views

How to mosaic images with different CRS with rasterio

I am doing mosaicing of 14 raster images (.img format) to completely cover a province.see original spatial location of separately opened tiles(). Mosiac operation is completed but 4 tiles are mosiaced ...
1
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1answer
52 views

How to Sample Locations from a Satellite Image

I am using the Near infrared and red bands from satellite images to research soil quality in southern Africa. The study site is about 20 km wide and 20 km long so almost square shape, and I am using 5 ...
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0answers
16 views

Resampling of Landsat 2 data

I am using data for Landsat 2, Landsat 5, Landsat 7 and Landsat 8 for same region for change detection analysis. As Landsat 2 has spatial resolution of 60 meter while all the other data are in 30 ...
0
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1answer
79 views

When adding properties to an image, no longer allowed to add to Map

If I create an image, that I add properties to, I can no longer add the image to the Map. How can I add it, or how can I add properties so that it doesn't break? var myPoint = ee.Geometry.Point([-64....
2
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2answers
23 views

Borders appear when reducing the global opacity of multiple raster images in QGIS 3.2.3

I want to reduce the opacity of multiple raster images and when I use the global opacity slider to do so, black borders appear between my images. I would want to eliminate these borders.
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1answer
50 views

Use open layers plugin display as georeferenced image in QGIS

Could someone tell me if it is possible to save a plugin open layers display as georeferenced image in QGIS 2.18?
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0answers
26 views

Embedding images into feature class using ArcMap?

I have a feature class with 9,000+ points and want to add a new raster field which will contain a single image (photo) for each point. However with 9,000+ images you can imagine this can be a tedious ...
0
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1answer
156 views

Intersect of raster image on Google Earth Engine

I have this situation on Google Earth Engine: 3 different images, each of these are made by 17 different bands. These bands represent the different year. I call these images with these letter: a,b ...
0
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1answer
708 views

Reading a 4 band image with rasterio (python)

I am trying to view a tif satellite image which has 4 bands. I want to remove the last band (NIR) and view the RGB image only, so I am trying to split the NIR from the rest of the image. Here is my ...
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0answers
34 views

QGIS Web View doesn't show up picture correctly

As a part of my graduation project, im working in data system that can show up features about a railway inspection. One of the features are images that show up failures. These images are from URL ...
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0answers
24 views

Unable to view previously published AGOL Map Image Layer

It's been a while since I've worked with AGOl and map image layers. I'm in the process of republishing several Map Image Layers to a new server. The issue I've been having involves not being able to ...
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0answers
77 views

Keep high resolution on image export?

I'm currently trying to export a PDF from an image service that we have hosted. The imagery looks great within Arcmap, but the exported imagery looks really rough (coarsened). Does anyone know what ...
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1answer
653 views

Convert PNG image to Shapefile in QGIS [closed]

I have a district boundary shapefile. I want to divide that district according to the boundaries given in image. How we can achieve it? Can we add vector file first then add image as an overlay on ...
0
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1answer
147 views

How to convert masks generated by rasterio to channel last mask

The problem is about using rasterio to generate mask from GeoJSON file which contains geographic coordinates. The function that I used is from: from rasterio.tools.mask import mask with rasterio....
3
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0answers
122 views

Could not allocate required memory for image

I'm trying to export a 24k image (export set to 1650DPI) using the "export as image" function but I keep getting the "Could not allocate required memory for image" warning. I don't understand why ...
1
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1answer
103 views

Classification erosion - semi-automatic classification plugin

I get an error when working Classification Erosion tool in Semi-automatic Classification Plugin (SCP). I use QGIS v3.2.2 and SCP v6.2.4. The tool is not changing the pixels of the raster layer and ...
2
votes
1answer
95 views

White stripe when exporting QgsLayout Map to image

I have a problem when I try to export a Map in the Layout of QGIS 3 with the Python API. Here is my code : qpt = QDomDocument() qpt.setContent(content) layout = QgsLayout(QgsProject().instance()) ...
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1answer
1k views

Image collection to Single Image in Google Earth Engine

I'm stuck with an issue in google earth engine. I'm working with MODIS Burned Area Monthly Global 500m, for a certain polygon area: var MOD = ee.ImageCollection('MODIS/006/MCD64A1'); var MOD1 = MOD....
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1answer
42 views

Colorize radar imagery so it looks like optical imagery

Here is an imagery from a radar satellite Is it possible to colorize a radar image, so it looks like and enables the same kinds of analysis as for an image captured from an optical satellite (simple ...
0
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1answer
230 views

Merging Shapefile with Image in QGIS? [closed]

QGIS version 3.2.1 Windows 10 Project File on GitHub Shape files on Github I am trying to create shapefile from coffee cup image. The actual coffee should be the shapefile. However I would like ...
0
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1answer
773 views

Earth engine error: Error: Invalid argument: 'image' must be of type Image

I'm trying to export an image for some SST temperatures for a given region ( and imported table EEZ) but I'm getting the error; Error: Invalid argument: 'image' must be of type Image Map.addLayer(...
1
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2answers
132 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 ...