Latest Contributions by MervynLotter

Hi Jim Sorry, I did not provide too many details for step 7, it was added as a bit of an afterthought. So once you have the Clip raster function (RF) set and it is working, then zoom/pan to a new area and then right click on layer in Contents pane and select Edit Raster Chain. This opens up a view similar to ModelBuilder where you can string RFs together. But we wont worry about that now. Right click on the yellow block labelled Clip, and select Properties.  Then click on the map-like Capture Current Map Extent button to update the Output Extent. You should see the extent values change.  Click OK to close the RF parameters dialogue and then click on the blue side arrow button called Apply.  The Histogram should update and you can then choose to close RF edit chain view or continue to zoom to a new area.  Good luck and let me know if you have any problems.  ... View more

Thinking more about it, if you really do require a histogram for a certain area, then I have a workaround. From the Imagery tab select the Raster Functions option.  This opens up the Raster Functions pane and search for Clip. Add your raster under "Raster" and then browse to your required extent. Then click on the rather non-descript map-like icon in bottom right which will "Capture Current Map Extent". Click on Create new Layer at bottom of pane and a virtual new raster layer will be created and added to you map and Content pane that does not take up any disk space.  Then right-click on this new raster function layer and choose Create Chart>Histogram.  Select your band number and your histogram will be created that honours the map extent used in the Clip raster function.  You can then always right-click on your new raster function layer under Content pane and Edit Function Chain. Changing the extent will automatically update the histogram but you must first click Apply after editing the extent of the Clip raster function. ... View more

Hi James Working with rasters is a different ball game and charts do generally work differently. With rasters you have a limited set of chart options and you generally first define an area of interest (so limiting the number of pixels it has to load), before you can interact with the data in a chart. But having said that, when working with rasters the histogram chart does appear to offer all of the same functionality as for vector data but the Filter by Selection is not working for me either. I tested your workflow using a Landsat image and I could not get it to work. Perhaps this is by design - I hope someone from Esri can advise us. Regarding Filter by Selection, this does work nicely but then you need a raster with an attribute table. Selection works on the attribute table and not the pixels (as with vector data), and with rasters you can use GP tools such as Select by Attributes if you have an attribute table. If needed, there is a GP tool called Build Raster Attribute Table but it only works on single band rasters. I am not sure of your required workflow but perhaps take a look at a Scatter Plot (requires that you select 2 bands). What I like a lot about it is that if you have a polygon layer in your Contents pane with your areas of interest, then if you first click on the Feature Selector under Define an area of interest, and then click on the polygon within your map view, it will only chart the pixel values for the respective polygon area.   Then regarding your comment about Range Sliders. These are only available for vector datasets and only for attributes with integer values (so no decimal values). Do take a look at Raster Functions as they offer a lot of great functionality when working with raster data. Do see Raster functions—ArcGIS Pro | Documentation  Regards Mervyn  ... View more

Hi James I have created a short 40 second video to demonstrate how Filter by Extent and Filter by Selection works using a scatter plot.  Mervyn ... View more

Just to add that rasters appear solid grey when they (or their overviews) do not have their statistics calculated, so Pro is unable to display their pixel values.  ... View more

Hi Grace That is weird, this morning your post was displaying under ArcGIS Earth but now under ArcGIS Pro. But not important. I see now that when I created the screen grab for you, I accidentally checked the wrong box. My mistake. The text is correct but not the screen-grab. Please make sure you check the Use Input Features for Clipping Geometry check-box.  One should be careful when clipping a raster and using the Maintain Clipping Extent option as it alters the geometry of the original input raster by trying to ensure that it fits exactly within the clipping polygon, so it may assign a new starting coordinate and subsequently resample the raster pixels which is never good practice when working with rasters. The resulting output will most likely be slightly less accurate than the original input raster.  Another option for you to try will be to set the extent and mask. Setting the mask is another one of the Environment settings option but available under the Analysis tab and the Geoprocessing group. Do see the below screen grab. When working with rasters I often set these two options but afterwards I try and make a point of changing it back to the defaults otherwise 6 months from now it can cause some head scratching when rerunning a different tool in the same Pro project.  ... View more

Hi Grace You have posted this question under the wrong software discussion group in Geonet, ArcGIS Earth, and not ArcGIS Pro as your screenshot shows. I am not sure how you would move it. The Clip Raster tool is available in ArcGIS Pro and should work for your need. Did you select the option (checkbox) for "Use Input Features for Clipping Geometry when running the tool. If you dont select this option then the output will not honor the shape of the clipping polygon.  It is good practice to also make use of the Environments tab and set the processing extent and any other options you require. ... View more

I was also able to add a logo to the header Toolbar and ColumnLayout on the GalleryPage and MapPage. They just appear a bit small.  This was the code I used. Any suggestions as to a better way of doing so or how to increase image size? Thanks. ColumnLayout { id: toolBarColumn width: parent.width spacing: 0 Item { Layout.fillWidth: true Layout.preferredHeight: headerRow.height RowLayout { id: headerRow height: app.headerHeight spacing: 0 Controls.Icon { imageSource: "../images/mtpa2.png" Layout.leftMargin: app.widthOffset Layout.alignment: Qt.AlignVCenter } ... View more

Just to add to with my first question above regarding the difficulty of closing the MapViewer app on a Windows device, it seems to be intermittent. I am running the app on a computer with dual monitors and sometimes the app opens fullscreen without the thin white strip at the top, which does have the option to close the app, other times this strip/header is not present so it it more difficult to close using conventional ways. I will see if I can reproduce it more reliably.  ... View more

Thank you so much! I really appreciate the assistance.  ... View more

Dear ApddStudio Team After configuring some of my webmaps to show in the MapViewer template, I created the executables for Android and Windows 10 desktop. I then installed them on the respective devices.  I have two questions. 1) When the MapViewer loads in Windows, there does not seem to be a menu option to close the application. Am I missing something? On Android it is easy to just click on teh back button to exit the application. 2) Is it possible to load a static image, like a logo, to the webmap header page? If so, would it be on the Panel.qml or MenuPage.qml control pages? Could you please provide a bit more detail if it is possible? Thank you ... View more

Dear Mallemala Kishore I would also really like the webmap popups to be honoured in my MapViewer app.  You seem to have modified the code to get it to work. Can you please provide a bit more details as to where in the PanelPage.qml you made these changes? Did you also need to make changes to the IdentifyFeaturesView.qml? Thank you ... View more

This sounds like something that Attribute Rules can accomplish. Take a look at this great demo of attribute rules recorded during last year's Esri Dev Summit. Hussein accomplished the same workflow if I remember correctly.  https://www.youtube.com/watch?v=HuWymMh6igk&t=2s ... View more

I think the use of "limited" in the basic and standard license is because you can only Union two files at a time. With the advanced license you can Union a bunch of files at a time.  ... View more