Questions tagged [date]
Time stated in terms of the day, month, and year.
192
questions
1
vote
0answers
12 views
GEE - Get date of ImageCollection mosaic
I have created mosaics by date from an ImageCollection and now want to label each mosaic with its corresponding date. This is my function to label the ImageCollection:
var date_label_pos = ee....
0
votes
1answer
24 views
Custom form with QT for QGIS 3.4, Date edit Widget, Null value
I made a custom form for QGis with QT-designer and I have a problem with the Date-Widget.
When I create a form in QGIS with drag and drop or automatically, then it works: Fore a date-field I can ...
0
votes
1answer
23 views
Date of reference in an feature collection
I am pretty new on GEE and idk how easy is this task. I want to find daily precipitation for all Brazilian municipalities in 2006. I applied a map function with reduce regions and end up with a ...
0
votes
1answer
30 views
Difference between `system:index` and `system:time_start` properties in Google Earth Engine
If I want to know the date of image acquisition, would it be the system:index or system:time_start property?
I'm afraid I have been created a mess and used wrong dates.
For example, if I have this ...
1
vote
1answer
28 views
Datefilter in leaflet.js
How do I filter data by date. If I want to filter, I can see the old filtering too. The layers are stacked on top of each other. How do I get the current date range.
<div id="time-ranges" class="...
1
vote
1answer
32 views
Python code snippet to label years (e.g. 2015) and not label anything with a 0
I've been unable to solve this seemingly rudimentary issue of running a python snippet via the label expression option in ArcGIS. I've read this documentation Building label expressions, but wasn't ...
0
votes
2answers
90 views
Format date in CartoCSS infowindow
I have a date feild in my data and when I add it to an info window, it shows in zulu time (2017-11-06T00:00:00.000). Is there a way to format the cartoCSS and HTML so that only the date, and not the ...
0
votes
1answer
47 views
GEE error when extracting image timestamp
I have filtered Sentinel 2 images to get suitable cloud free images from the time period I require, however I cannot figure out how to extract the date from the images, but with my current code I get ...
0
votes
1answer
28 views
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 ...
7
votes
2answers
155 views
QGIS 3.4 calculate date, add month
I want to add a number of months to a date to get a new date. I have a date-field "date", an integer-field "months" and a date-field "new_date". I want to calculate the "new_date" by adding the "...
1
vote
1answer
28 views
Adding time band as year to NDVI composite
I try to add time band to my NDVI time-series and using this function (took it from developers guide), for regression calculation.
It looks like script is working but magnitude of slopes is extremely ...
0
votes
0answers
31 views
Updating Date Field based on date value ONLY from another field using ArcGIS Field Calculator
In ArcMap 10.4 I have the following code in Pre-Logic Script Code Section in Field Calculator with python option selected and show code block:
from datetime import datetime
def myfunction(date_text):...
0
votes
1answer
73 views
Grouping wildfires dates by season and getting sum and count using ArcPy?
I am having some trouble creating a new shapefile and CSV to group wildfires into seasons.
What I want to do is to group the wildfires by meteorological season (summer, fall, winter and spring) for ...
9
votes
3answers
4k views
How to convert a string field to a date field
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 to date field but ...
1
vote
1answer
125 views
Calculate date difference (days) with expressions (QGIS)
I would like to calculate the number of days between two dates. The first date is written in attribute table [YYYY-MM-DD] (creation date) and the second is today [now()]. The goal is, to get the age ...
1
vote
2answers
41 views
Which time format does ESA use for Sentinel-3 file names?
regarding the ESA Sentinel-3 file name convention I have got a question; which time zone (GMT, CEST, ...) does ESA use? I could not find anything yet, even it should be a critical point for many users....
1
vote
1answer
59 views
Calculation with Date in Earth Engine?
How can I add or subtract from a date in Google Earth Engine?
See my codes here-
var imagedate = ee.Date(collectionLT05_1991_1.get('system:time_start'));
var imaagedate1 = imagedate+1;
print(...
3
votes
1answer
102 views
Change data format in QGIS field calculator using format_date
I´d like to change the data format in the attribute table from yyyy-MM-dd (default) to dd.MM.yy using the format_date function in the field calculator.
Using:
format_date(date, 'dd.MM.yy')
I got ...
4
votes
2answers
1k views
Transforming ArcGIS date field to integer?
I have a featureclass with a 'date' class field named 'ACQ_DATE' formatted as:
1-8-2013
24-7-2013
etc. As you can see the number of digits is not harmonized. I want to display the dates on a ...
7
votes
4answers
997 views
Parsing serial date in ArcGIS Desktop?
I have imported a shapefile that contains a serial date number that looks like this: 41256.260799. I would like to create a new field that shows only the hour and second like this: 06:33. I've tried ...
0
votes
0answers
97 views
Google Earth Engine timelapse video: How to display the date (year) of each image in the video? [duplicate]
I'm currently producing Timelapses with Google Earth Engine. I have produced the video but I haven't found a way of adding the Date (or the Year of the picture) to the different images that are being ...
0
votes
1answer
30 views
Pulling date from filename and in proper format for time enabled use?
My feature attribute table has a folderpath that indludes a date time.
Example:/documents/foldername/xyz2015OCT15063333.shp
It seems very simple, but I am not a programmer and have done my best to ...
1
vote
2answers
44 views
Introduce year instead of whole date in date type field using ArcGIS Desktop?
I have a field with numbers in it (concentration of chemical compounds that were presented in aquatic environments) and I'd like to combine them with a field which would have date type capabilities ...
2
votes
3answers
2k views
Symbolizing by year, when date column has MM/DD/YYYY?
I am trying to symbolize an SDE feature, so I can't add any new columns. The date column is formatted as MM/DD/YYYY. I would like to symbolize all 2015s as one symbol, 2016, 2017 as other unique ...
0
votes
0answers
64 views
Sorting Identify feature results by DATE field in ArcMap?
I'm using ArcMap 10.3. When I use the Identify tool, I often have many results and would like to sort those results in the Identify window. If I right-click on the layer name or features in Identify ...
0
votes
2answers
43 views
Selecting multiple date ranges using Select By Attribute?
Using ArcGIS Desktop 10.6.1. I'm interested in selecting multiple date ranges using Select By Attribute.
I've verified that each date range works. For example Date >= '2015-04-15' AND Date <= '...
1
vote
1answer
48 views
Locating date, scale, and coordinate system of shapefile in ArcMap?
I am trying to locate the date, scale, and coordinate system/projection of a shapefile in ArcMap but when I right click on the file in the table of contents and go to properties, I don't see the date ...
1
vote
0answers
55 views
Datetime on attribute tables
I have written a script to add, among other stuff, a datetime column.
I have used the arcpy.AddField_managementcommand, but it didn't have a 'Datetime' type, so I used the 'Date' type : arcpy....
1
vote
1answer
47 views
Storing date in m-dimension of PostGIS geometries
Do you know if it is possible to assign a date (whatever the format) as the 4th dimension to a geometry in PostGIS? If so, does it recognize it as a date?
0
votes
0answers
12 views
Creating polygon for each day from table with change of area over time (by day) using ArcGIS Pro?
I have a .csv with data in rows over time (date field and multiple attributes for each day) of the same single area - the fields are high temperature, low temperature, humidity, precipitation.
I want ...
3
votes
1answer
491 views
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 ...
8
votes
2answers
3k views
Making automatic updated date and time field in QGIS?
I want to make a date and time updated field as I edit an attribute field in this format yyyy-mm-dd 00:00:00 (= 2016-05-08 11:04:00) - my local date/time. The data is in a QGIS 2.14 shapefile and ...
1
vote
1answer
76 views
How to have a date earlier than 1753 in QGIS date field?
I'm trying to map out some of my family tree but I've stumbled upon a problem of not being able to put in early dates.
I created the shapefile in QGIS and included a date field (dd-mm-yyyy).
Whenever ...
2
votes
1answer
367 views
Filter Specific dates in Google Earth Engine?
I've called Landsat8 images from 2014 to 2019 using filter date function. But I don't know how can I call Landsat8 images only for June, July, and August from 2014 to 2019?
Map.centerObject(geometry);...
3
votes
1answer
395 views
Add Date to raster layers in raster stack in R
I have a raster stack and I want to add to it a Date field which will include the year-month-day for every rasterlayer. I have my dates in a one column data.frame.
I tried to do this with addLayer ...
0
votes
1answer
48 views
Stripes between 2 images of Sentinel 2A (Level-1C)
Why do i get these stripes between 2 images of Sentinel 2A? (Figure)
I notice that this happened for 2 images of different sensing date (even they're just 3 days away).
Has anyone had this ...
0
votes
0answers
29 views
Selecting values with date-format by using SelectLayerByAttribute_management with input Parameter
I am working on a Tool which selects records depending on the input value.
Works fine, till I want to select date-records. I used
def buildWhereClause(self, table, field, value):
# Add DBMS-...
2
votes
1answer
859 views
Changing date format in QGIS?
I have just created a date field attribute.
In Proprieties > Fields of the layer I made this:
And the attribute tables shows this:
What I want to see is the date in this format: 07-01-2019 and ...
2
votes
3answers
148 views
Batch rename MODIS data?
I have MOD13Q1 NDVI images. Data are named in this format:
MOD13Q1.A2007049.h26v06.006.2015161224938_MODIS_Grid_16DAY_250m_500m_VI.tif
(YYYYDDD) Here 2007 is a year and 049 is day in year.
I ...
0
votes
1answer
47 views
Selecting points in polygon in a range of time (ArcGIS)
I have:
- point GPS for people (time in seconds)
- buffer GPS for a car (time in seconds)
What I want to do is for each buffer GPS coordinate, I want to find the number of GPS people points inside ...
5
votes
2answers
324 views
QGIS date fields widget - unable to select todays date?
This is something that I have lived with for several months as there is an easy workaround, but I thought I'd see if anyone knows of a solution, or whether it is a bug.
In Layer Properties > Fields I ...
0
votes
1answer
43 views
Add default month/day to known year in new date field?
I have a text field featuring a 4 digit year. How would I assign a default month and day to the year in a new date field?
ex. 2010 needs to be converted to 1/1/2010
I attempted this in the field ...
1
vote
1answer
205 views
Filter a date interval (month) shapefile
I'm trying to filter some data of a shapefile (with "Filter") for QGIS to show points in a date interval of a shapefile. I have a shapefile which has a table of attributes of sightings of animals with ...
1
vote
1answer
260 views
Filter Google Earth Engine image collection between today and 10 days ago
I wrote a small script that filters GEE image collection by date that I'm manually change:
var start_date = '2018-11-02'
var end_date = '2018-11-30'
// choose image collection
var ls8 = ee....
6
votes
2answers
1k views
Binding between QGIS custom form (Qt Designer) and date/time field in SpatiaLite database table?
For my attribute table I created a custom form in Qt Designer. The table has a date field and a time field.
In Qt Designer there are widgets for entering date and time but what data type is expected ...
1
vote
0answers
145 views
Converting double to date field using QGIS?
In ArcMap I have a table with a column with the date type yyyy-mm-dd, but after opening SQlite in QGIS, this column is written as a double type.
How do I convert data in the form of a number to a ...
1
vote
1answer
277 views
QGIS: Symbolize by date field based on current date
In QGIS 3.2.3: I have a layer/Shapefile with a date field (type DATE) that comes from a joined table. I would like to symbolize the points which are older than 10 days (based on the current date) in ...
1
vote
1answer
649 views
Arcade expression to see if current date is within two dates?
I am new to building expressions in Arcade and I am having trouble writing an expression that can be used to check start and end times of different areas and evaluate if the current date is within the ...
2
votes
1answer
2k views
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 ...
4
votes
1answer
63 views
How to determine the right time of Landsat 8?
Sorry, please help me clarify this issue.
Assume that I have information from a Landsat 8 image with the time shown as below:
Start time: 2018:288:03:13:25.1532590
Stop time: 2018:288:03:13:56....
