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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718 views

How to add dataURL image as source in OpenLayers?

I am building a web application with OpenLayersthat should have offline map support. I save pictures from a WMS server to the browser cache and load them from the cache as a dataURL. The next step is ...
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1answer
513 views

Why memory map file is larger than original slide

I am having a tiff slide with the dimension of 90112 x 100352. The slide size is 1.3GB . To process this slide i am creating a numpy memmap file with above dimension like below. If I check the size ...
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150 views

Annotating satellite images in the field

I have high res satellite imagery of my remote field location through Planet. I am working with indigenous communities on participant action mapping and would like to be able to annotate my images in ...
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1answer
244 views

Assigning latitude and longitude to a particular pixel in satellite image

Pixel of a satellite images can be assigned latitude and longitude, but how this is done as each pixel represent certain area depending on the resolution of image that can be too high to assign ...
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1answer
132 views

Rendering thumbnails of a GPX track with my own tiles as base layer

I created my own Map using Tilemill. Now I'd like to display thumbnails of a GPX track where my map is the base layer. Do you have any idea how to do this performantly? I wrote a script that does it ...
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1answer
259 views

arcmap export layer as a image with different scale

In our web application, we load too many layers cause the map loading very slow. I am thinking of export some static layers as images with different scale. There are totally 10 scales in our ...
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1answer
249 views

Georeferencing image from Google Earth?

What I want to do appears simple. However, there seems to be a bug. I have an image from GE which I want to georeference and set as a background layer. I thus set some placemarks on GE, wrote down ...
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1k views

Get lat/lon points from image pixels

I need to build an application with the following requirement: shows a map .png picture to user. then, users select several points around the map (I can get the x/y pixels from each point) based on ...
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1answer
79 views

How can I upload more than 10 images in a category map?

I did a category map with 30 different categories. For each, I would like to upload an image but the "wizards" permits me to upload only ten images and then one image for "others". Is it possible to ...
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1answer
720 views

How to import a simulation from ParaView to ArcMap?

I made a simulation and reworked the output with ParaView. I simulated an avalanche on a DEM and what I want to do is to compare the area of the simulated avalanche with that of the real avalanche. To ...
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2answers
131 views

Need Image with Sweref99_1800 projection/coordinate system

I need third party image tiles (probably world imagery) under sweref99_1800 projection and coordinate system (EPSG 3008). I found this link http://www.naturalearthdata.com/downloads/10m-raster-data/...
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14 views

Filter out duplicate Sentinel-2 Images form Earth Engine Image Collection by date

I'm stacking all the images from Sentinel-2A from the L1C image collection, but when viewing the images beforehand, I see that there are duplicates images, same imaging date but different processing ...
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29 views

Export: Error: Internal error. from Google Earth Engine

I'm attempting to export an image by a time block for a particular census KML using the method below. Earth Engine is kicking back "internal error". As the error is not very helpful, I am having a ...
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9 views

How to use SVG file as the source for a layer in OpenLayers

I found this solution online but this is defining your own projection. I do not want to use the projection below, I want to use 'EPSG:2326' and put the svg file over the map such that it overlays on ...
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0answers
32 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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1answer
43 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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59 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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36 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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19 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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26 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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0answers
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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63 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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69 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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29 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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1answer
316 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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19 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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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 ...
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1answer
201 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 ...
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25 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
120 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
196 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....
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1answer
99 views

Get convex hulls for all rasters in raster_columns [closed]

how to search the polygons of the images that I have in the Database? I want execute this function ST_AsText(ST_ConvexHull(rast)) for every "r_table_name" SELECT r_table_name FROM ...
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1answer
69 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
430 views

How can I display a GeoTIFF with multiple bands on OpenLayers?

I have a NetCDF file including 1365 bands (when opening in QGIS for example). To display it on an online map like OpenLayers, I tried to export it as a GeoTIFF image. I read a solution here that ...
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0answers
71 views

High resolution is RGB image is not coming clear and sharp?

I am woking with LISS IV image of Indian Satellite Resousesat-2. This image has 3 bands i.e., NIR, Red, and Green band and spatial resolution of five meter. When I view the image in ArcGIS the ...
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20 views

Too many fields, cannot see them in qgis2web

I have too many fields, so they can't all be seen, is there a work around for this? see this image As you can see the info "bleeds" over and you cannot see it, I need to reshape that as a box ...
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1answer
226 views

CARTO DB / Adding images using layer.on('featureClick',function(e,latlng,pos,data)

Each of my data points have a different image. The images are all loaded in CARTO and the column has a name. I need to call each of the images on click event. I've been using the layer.on('...
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1answer
269 views

Mapbox GL JS embed image in toggle menu

I would like to embed images inside of the toggle controls so that the user can use the toggle menu as a legend, how do I go about this using Mapbox GL JS? <!DOCTYPE html> <html> <...
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674 views

Arcmap - add an image to a legend that is not part of layer symbology

I am making a simple map, showing store locations on a background. Each store brand is displayed with an image (a coloured square with a letter e.g. Aldi might be a blue square with the letter "A" ...
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0answers
47 views

QGIS Uploading images or files for features

I am using a QGIS 2.12 project and I would like to know if it is possible to upload files and photos for each element in a layer. The files should be stored for example in C:\myproject\files I can't ...
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1answer
218 views

Georeference a polyygon within a pdf file [duplicate]

I have this pdf file that contains a specific borough of my city, Montreal, with a polygon inside it. Link to pdf file: PDF FILE The jpeg image once exported from the pdf file is the following I am ...
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1answer
1k views

How to add image(.jpg) to OpenLayers?

This is my website for test: http://www.cv.nctu.edu.tw/shapefile-js-openlayers/ol_simple.html My dem data is (.jpg). var inProj = new OpenLayers.Projection('EPSG:3826'); var outProj = map....
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0answers
21 views

image size has been increased after i.atcorr

I have compiled i.atcorr and run for different data sets. The problem is, it is writing the output 4 times of input image. I checked for data types, they are fine. I am not able to catch where ...
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1answer
128 views

ArcObjects ExportMapImage modifies image extent

I am trying to extract a map image at a certain range. I am using IMxdServer's ExportMapImage method, documented here. Here is the relevant snippet of code: IMapDocumentPtr ipMapDoc(...
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0answers
247 views

Exporting basemap & Layers as an image?

I need a open-source server-side component for a web-application that can export basemaps + layers to an image format (saved on a db). Being slightly new to GIS, I've managed to find a few tools that ...
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1answer
1k views

How to find out Actual coordinate(pixel values) of chunk relative to the actual image?

I have an image of let say 500 X 500 px, I created tiles/chunks of size (10, 10). Now I want to find out actual chunk coordinate relative to the Original 500X500 px image. Ex I have first chunk of ...
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1answer
2k views

How to change Numpy array shape [closed]

I have an array (Numpy of shape (100, 256, 256). How can I change this to (100, 256, 256,3)? I tried doing reshape but it doesn't work, Can anyone help me.
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1answer
1k views

Calculating Percentage of land cover/land use images in ARCGIS [closed]

I want to ask how each land use percentage can be calculated to show water, settlements, forest, agriculture percentages. Can you suggest the process?
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1answer
161 views

Displaying EPSG:32649-WGS 84 image on EPSG:4326 map in ArcMap?

I have a image has EPSG:32649 coordinate system and I want to display this image on a EPSG:4326 map on arcgis desktop (ArcMap). Any one can help me?