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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6 views

Mirror image from georeferenced data

I created an image by converting georeferenced data. Unfortunately, it is the mirror of what it should be: I followed the instructions of a very recently published learning manual and did so a second ...
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1answer
40 views

Label or font colors on an imagery background examples

I have been in searching of a website that was done by somebody from ESRI that wrote about...if I remember right...it was in either on the ArcGIS Mapping Center or in the ESRI Technical support ...
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2answers
51 views

Coordinates of image corners for ImageExtent in Openlayers 5?

It is possible to get the coordinates of the four corners of the image, given the center of the image coordinate? or the bottom left and upper right corners? Currently, I am center the map in the lat/...
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27 views

Show image (photo) which is stored as base64 in ArcGIS

I have a PostGIS table which stores point data with images as attribute (in base64 data type). I would like to show the pictures from the column "bild" of the attribute table which look like this in ...
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98 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
13 views

Linked popup image in GeoJSON file

Developing the issue solved in this post: Trying to pop up image in GeoJSON file? I would like to have each GeoJSON image thumbnail possible to open in larger window. I was trying to connect with ...
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1answer
31 views

Trying to pop up image in GeoJSON file?

I am trying to put an image inside the geoJSON file. I know, that Geojson works as string and I cannot input the image directly, however I found some stuff, like this below: http://www....
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1answer
21 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 ...
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11 views

Multiply two image collections with different sizes based on dates

I have two image collections. They are both filtered by date beginning on Jan 1, 2019, and ending on today's date. The size of the first (kc) is 35 images and the second (ETo) is 225. The first has an ...
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14 views

Mask out areas inside a feature collection on Google Earth Engine

I am quite new to javascript and I am trying to apply a mask on an image to exclude areas inside a feature collection, I have seen that for the case of image collections the "mask" and "mask.not" ...
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1answer
67 views

Can legends be exported as image in CARTO BUILDER?

How to add a legend when exporting a BUILDER map as jpg/png image?
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1answer
24 views

QGIS georeferencer distorting 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
34 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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1answer
24 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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1answer
288 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 ...
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2answers
121 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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2answers
945 views

Seeking Icon library for custom GIS software? [duplicate]

I am building a desktop application and currently utilizing a mix of icons for pan, select, zoom, attribute table, etc that have been randomly taken from the internet and modified. The overall look ...
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2answers
39 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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22 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 ...
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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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43 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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35 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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26 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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28 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 ...
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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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2answers
5k views

Reading and writing tiff image and locate pixels and bands of images in R? [closed]

I am new in R. I want to know how to read and write tiff format image in R and how to use R to locate pixels and bands of images My environment is in Windows when I try to read tiff image it shows ...
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2answers
129 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 ...
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14 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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40 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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1answer
64 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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82 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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19 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 ...
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53 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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24 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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1answer
5k views

Creating scatterplot with icons (svg or png) instead of points?

I'm just starting with R and I wanted to know if it's possible to create a scatterplot with custom icons (svg or png) instead of points. I started to import a shapefile, and then I have a set of ...
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2answers
2k views

Georeferencing Photos With No Spatial Reference?

I have about 100-200 field ground shot photos I would like to overlay in ArcGIS 10 that have no spatial information which I need to somehow develop using a photogrammetric formula. The camera was ...
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1answer
201 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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4answers
11k views

Import Aerial Images from Google into QGIS?

QGIS 2.6.1, Windows 7 I am looking to import an image from Google Earth into an existing QGIS project. Is it possible to download geo-referenced images from google maps (or google earth) and import ...
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56 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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65 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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1answer
1k views

Set coordinate origin to the top left corner

I have a BMP-picture and I know that it's top left corner has the EPSG:3068 coordinates 35500,24390. I would like to use gdal_polygonize and than calculate the EPSG:3068 coordinates of the produced ...
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1answer
44 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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27 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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25 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 ...
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100 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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1answer
146 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
207 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 ...
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17 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 ...
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1answer
92 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....