Questions tagged [date]
Time stated in terms of the day, month, and year.
282
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Carto time-series widget: how to change bucket labels?
I am using the Carto builder animated time-series widget based on a number column that contains a year as a four digit integer. In the widget's horizontal axis, the buckets are not labeled with ...
CommunityBot
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ArcPy - Get Date as parameter value and calculate Date field
In my ArcPy script I have an input parameter for the Date, so the user is asked to input a date value (time is not needed) using the data type GPDate.
In the script I calculate a new field, field data ...
CommunityBot
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DataTable Charts issue in Google Earth Engine
I am working on drawing a chart using datatable. So I followed the instructions in https://developers.google.com/earth-engine/guides/charts_datatable
I noticed a 30 days shift between the data and the ...
CommunityBot
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Filtering by Current date
I am trying to build a query on a layer that uses the current date with a data source of a file geodatabase. I had this query working in ArcGIS Pro, but would like to figure it out in QGIS.
In Pro, ...
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1
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Making rule on dates for vector points in QGIS
In QGIS, I would like to create a rule-based on dates for some vector points. These points have a field for dates, in the format dd/mm/yy. The rule would be such that if a date is less than a certain ...
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Auto update date-time in QGIS
In QGIS 3.10 I need something to auto update a datetime attribute.
I need it to update only when any other attribute is updated.
I have tried the following:
Steps:
Add a Edited Date Field (ESRI uses ...
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1
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1
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159
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Date coming through as NULL when data type is set to "date" in csv/t
If I set the data type to date(DD-MM-YYYY) in the CSVt file the date comes through but as a String/text. But I really need it to be date type.
My CSV field looks like this:
NAME,DATE,TIME,SPECIES
...
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Data type of date column is showing as string in QGIS but back in CSV file it is date type [closed]
I have created a .csvt file as name as same CSV file and placed in same directory. After that data type of date column are showing as a date type but when I am checking it in attribute table values ...
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1
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ArcMap - Date field
I am trying to append some data to an existing enterprise geodatabase feature class, the data I am trying to append has a date field where some entries are in correct, eg instead of 03/19/1983 they ...
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Display layer with its date in GEE
I want to display the image with its date as the layer name, but the following code does not work.
var s2 = ee.ImageCollection('COPERNICUS/S2_SR').filterBounds(roi).filterDate(startdate, enddate)....
CommunityBot
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Converting raster stack or brick to ts time series object to run in BFAST
# created rasters from .tif file (r1,r2,r3,r4,r5,r6,r7)
# created raster stack
r_stack <- stack(r1,r2,r3,r4,r5,r6,r7)
class : RasterStack
dimensions : 743, 1893, 1406499, 7 (nrow, ncol,...
CommunityBot
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458
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Trouble with using Freemarker to formate Date for GeoServer GetFeatureInfo
I'm having some trouble while trying to use the Freemarker Template to display dates in the desired format.
I store points with a date information in a PostGIS database written through an FME-process ...
CommunityBot
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Creating date fields in ArcGIS Pro
I am trying to create a month and a day column in ArcGIS Pro 2.8. For values I just want to have "01" and "01" for month and day respectively. So, I have 1032 rows, thus "01&...
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Definition Queries for most recent date in ArcGIS Pro
I have a feature class containing sample results for locations that includes thousands of records. Many of these are overlapping and have the same location ID. I need to label each sample based on the ...
CommunityBot
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filter.date not working GEE
I am trying to filter deforestation alerts (image collection) by date.
However, it does not work, because my output is empty.
My code is the following:
var date1 = ee.Number(fecha1.getRelative('day','...
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1
answer
85
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Update a date field to now(), when a checkbox has been checked in QGIS 3.16
I want to update my date field to the current date when a checkbox has been checked.The date field is Sur_com, the checkbox is Sur_check.
I have tried codes below:
First:
layer = qgis.utils.iface....
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46
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Function returns zero features GEE when filter image collection by date
I am trying to create a function that filters a collection by a date range.
In my code, the user can select two dates in which they want to create an anlysis.
The way the code is build, the users fill ...
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1
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69
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Change date type of entire image collection from Julian to gregorian date GEE
I am having an image collection which contains two bands, one of them is called 'Date'. The format is in Julian format. However, for my analysis I need the dates in gregorian (normal calender i ...
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Selecting NULL or date values by Expression in QGIS
How can I select by expression from a date field in a shapefile, dates that are NULL or >= 2020-01-01?
This doesn't work, it only selects those with dates >= 2020-01-01, not the NULLs
"...
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1
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QGIS Colour points by date
I have a point layer representing bird sightings. Each sighting has a survey date associated with it. I am trying to figure out a way to have QGIS display these point in a way that each date has a ...
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ArcGIS Pro date handling with different specificities in one column
I have a date column in my attribute table, some of the dates are just the year, and some are the month/day/year. I made the table in excel, and when I imported it into my gdb, I specific all the data ...
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Return the acquisition time of an Landsat 7 image?
I try to get the timestamp of the least cloudy image for my region of interest (roi). I want to obtain the date of this image in the time range 2012-10-01 - 2012-12-31. I know that the image exists ...
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2
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Convert date/time format
My shapefile contains a attribute field called "created" (type QString) and this field holds the date and time of every feature in this format: "2022-03-04-13-28-26" (yyyy-mm-dd-hh-...
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76
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Convert string column to date
I have a column of type string in the following form
23/02/2021
how can I either
a) convert this column to Date format
b) create a new column where each cell contains the value in valid date format?
...
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2
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What is the standard approach to store dates as pixel values in raster? [closed]
I have a raster, where the value of a pixel should represent the date at which that pixel was deforested. Dates ranging from 2015 until today. I need resolution to be at the level of day.
I would like ...
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SLD - Failed to build legend preview
I write an SLD style on GeoServer. The date in label is showing with the letter 'Z' at the end (2021-07-28Z). I want to display the date parameter in the label but without the 'Z' at the end.
The '...
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Converting Unix epoch time to GMT time using QGIS Field Calculator
I am trying to convert the 'time' and 'updated' column from epoch to date/time GMT but I am struggling to do so. I know I have to use the field calculator tab but I am a basic at using scripting.
I am ...
CommunityBot
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67
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GEE Image Collection to Multiband Image Outputs Gibberish
I'm using Landsat imagery in Google Earth Engine and am attempting to convert an image collection to a multiband image. However, before doing so I do two things:
I mosaic the images by date so that ...
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"NEW" Column of Data with DATES, for export as CSV
How could I add a "NEW" Column of Data with DATES to this SCRIPT, for export as CSV
var dataset = ee.ImageCollection('UCSB-CHG/CHIRPS/DAILY')
.filter(ee.Filter.date('2021-...
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2
answers
159
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Adding today's date to attribute table using PyQGIS
I have the following script to merge a group of layers, and I want to edit the script to add a field containing today's date in the attribute table and also delete some fields by their names?
root = ...
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2
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1
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QGIS expression function month() does not return month in MM format
Using QGIS expressions, the following expression returns 5:
month('2012-05-12') -> 5
The help, however, says that the output of this very expression is 05. I don't see an option to format the ...
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67
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Temporal controller year / annual data step skipping
I am working with a dataset which contains annual data for years in non-QGIS format i.e. 1951, 1955, etc from 1933 to 1955.
I have used " to_date( "year" , 'yyyy')" to convert ...
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Converting ee.Date object to client string in Google Earth Engine?
I'm trying to export all the images in an ImageCollection to Google Drive and by default name the output image with the date using format() function. However, when I try to name a export task by a ...
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1
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sunAngle() calculation in R giving wrong results
I need to find the hourly sun angle (angle at which the sun strikes the Earth) for a particular position (latitude, longitude) for a given day in Belgium. I used sunAngle() from "oce" ...
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2
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Finding missing dog using Google Earth [closed]
I know this isn't the place to ask, but I need help to find my dog. I was wondering if there was anyway to possible track which way he left or what happened to him. He has severe separation anxiety ...
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Converting string field into date field in QGIS
In QGIS I have a layer with points which represent the fatal road accidents and the field "dates_14_D" contains their date but its type is string. I would like to convert this string field ...
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104
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Subset image collection by specific dates, cannot interpret data Google Earth Engine
I am trying to subset an image collection by a list of dates. However, I keep getting the error that my dates are not interpretable.
The date list comes from an imported csv with a list of dates.
var ...
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50
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Dividing layer with tracks by individual days in QGIS
I have a CSV file that includes about 150 dates containing tracks for a particular bird. I successfully added it as a layer in QGIS.
My question is how can I divide all the dates into separate days?
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3
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272
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Splitting string with dates by '/'-character and getting ancient/latest date as new column in QGIS
I have dates separated by '/' character in column "date" in format RRMMDD as on the screenshot below:
I want to separate dates into another columns "date_from", "date_to"...
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Converting dates in a feature collection to a previous date
I have a featureCollection with the dates for 2021. I would like to do a date conversion for this featureCollection to get the same dates in 2017. I have written the function above but it returns the ...
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NDVI time series in R -- how do I create a time series object from a data frame?
I am doing a time series analysis of NDVI using the bfast package in R. Bfast requires a time series (TS) object.
I have successfully created a data frame with the NDVI at various point locations ...
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1
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50
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Reading Date property for an uploaded asset (FeatureCollection) in GEE
I have 16 points imported as an asset in GEE. Each of these points has a date property (STARTDATE) in epoch format. I am stuck at extracting this date in and using it to acquire before and after ...
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1
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798
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Editing date in *.ssf files?
So my trimble TSC1 Pro XRS (bought in 2000) is getting old I guess and it change byitself the date. I collected data this week, but it indicate from 1998.
I view this info because I can't apply ...
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GeoServer subtracts time difference to UTC from date stored in PostgreSQL
We have in our PostgreSQL database records that include a date, i.e. stored as data type date (yyyy-MM-dd). The data are published in Geoserver.
If we request the records from an OpenLayers ...
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92
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Modifying text box in layout view through ArcPy with ArcMap
I have the following textbox in a layout view:
Is it possible to modify the text through ArcPy?
I made that box as text, and it has no function added to it:
I just want to change the date so that ...
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55
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Email an alert when an attribute in a feature gets to a certain value
I am trying to see if it is possible to send an email to co-workers when an attribute field hits a certain value. We have Playground safety inspections and I want to send an email when a playground is ...
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2
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101
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How to prevent ArcGIS Pro Arcade expression adding one month on to my desired date?
I am trying to add dates to two date fields in ArcGIS Pro using expressions in Arcade.
When I use the expression Date(2020,10,29) the result in the field is 29/11/2020, which is one month later than ...
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79
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Auto updating rule based symbology categorised by date
I have a shapefile of "Detection Points". These have a "strength" attribute and a "date" on which each was made. Data collection is ongoing - that is it began in April ...
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91
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Visualizing most recent point by date in QGIS
Does anyone know how to visualize in QGIS, in a group of points with an associated date, the point corresponding to the last date?
For example, a vector layer with 4 points:
id
Name
Date
1
Joana
...
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61
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Converting date field using ArcMap
I need to convert the date field in the feature class. The original date format is 15-Jan-2012, 27-Apr-2012, likewise.
How can I convert it into MM/dd/yyyy format?
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