Questions tagged [data-collection]
For questions related to the collection of geospatial data.
52
questions
-1
votes
1answer
21 views
Prepopulate survey forms with unique coordinates [closed]
I want to do a survey using ODKCollect or similar, whereby for each form, my interviewer is directed to a predefined unique point, to collect detailed data about it. The idea is to collect information ...
3
votes
1answer
198 views
Differences and thresholdis of ImageCollection in GEE
I have the following code (very basic as I am new user), and I want to create an NDVI difference collection by subtracting every NDVI image from my initial collection, with its previous one (something ...
1
vote
1answer
346 views
Getting weekly mean composite in Google Earth Engine?
I am currently working on a time-series in Google Earth Engine. Iam still quite inexperienced, especially when it comes to functions.
I want to extract the mean values of Sentinel1-images for each ...
1
vote
1answer
392 views
Google Earth Engine: How to avoid gaps in date-wise image mosaicks?
This question is a follow-up to the excellent answer of Rodrigo E. Principe here: Mosaicking a Image Collection by Date (day) in Google Earth Engine
I am trying to apply the suggested code to gather ...
0
votes
1answer
376 views
Apply a mask to multiple images(for same geo location) in a image collection
I have a image collection which holds multiple images of the same area. I can apply mask individually to those images but how do I apply a mask to all the images in the collection. Say the mask i have ...
2
votes
1answer
655 views
Data collector mobile app with mapping capabilities [duplicate]
At work we have a GIS solution platform with 50+ GB of data in a Postgres cluster. Almost all tables have spatial columns. We have several clients consuming this information for different needs.
I'm ...
2
votes
0answers
99 views
Outline overview for available datasets in QGIS
Assuming you have several 100 000 files on your discs
which are all georeferenced
which are all readable within QGIS (Raster maps, sqlite maps, vector maps, shapefile etc.)
After 20+ years in ...
0
votes
0answers
290 views
Google Earth Engine: Stack an ImageCollection
Does anyone know how can I stack all this collection?
I made my own collection from January Landsat images (L7 and L5) and I would like to stack all the images to check which are the areas with more ...
3
votes
1answer
2k views
Field data collection for QGIS? [closed]
I'm new to the open-source GIS world, having abandoned ArcGIS due to costs, and am looking for an OS analog to the Collector app. What I'm seeking to do is collect field data with an Android cell ...
5
votes
1answer
2k views
How to apply a Cloud Mask in a collection?
I am trying to apply a mask cloud in a SAVI collection (LANDSAT) to get a chart with time variations between pixels.
var region = table3
Map.addLayer(table3)
var col = ee.ImageCollection('...
0
votes
2answers
157 views
ESRI Collector app- Offline record collection limit
I am wanting to find out what the maximum number of records people have collected while being offline on the ESRI Collector app. I am operating on an Ipad with a 64 GB capacity.
Has anyone load ...
3
votes
2answers
2k views
“Batch processing” data of multiple ROIs in Google Earth Engine
I have written a rather simple script for data selection and subsequent export in GEE:
//Create region of interest -> Should be replaced by manual selection of ROIs or ROI center points and ...
1
vote
0answers
201 views
Field data inspection and collection using GeoODK?
In my workplace we are looking at collecting and inspecting GIS data using free mobile apps. The one that is fit-for-purpose from a data collection point of view is GeoODK. I have been able to prepare ...
1
vote
1answer
116 views
Collecting offline spatial data on iPads? [closed]
I a looking for an iOS app or any approach, that will allow me to do offline map-based surveys and upload the data back to one single database once I am online (like the Esri Collector), but:
in ...
-3
votes
1answer
98 views
Acquiring data of Billboards on USA [closed]
I have this task on ArcGis consisting on retrieving landownership data of every billboards' in USA, etc... from where should I start ?
7
votes
4answers
4k views
US ZIP Codes +4 By State or County- Shapefile (or table/dbf)
I am looking for Zipcode data with the +4 digits at the end for a City (I can use it by state and clip the points to my municipal boundary). I called the post office and had no luck (national customer ...
1
vote
0answers
455 views
How to read NMEA message using GPSD? [closed]
I am trying to read NMEA messages via GPSD (http://www.catb.org/gpsd/), but I do not know how to do that.
I have a GPS antenna which connects to the u-blox M8 GNSS Evaluation Kit Timin (https://www.u-...
0
votes
1answer
64 views
Form Creation for use in ArcMap [closed]
I am using ArcMap 10.2.
I am trying to create a form to use in the field (on a construction site). This form will be used to inspect features such as a inlet. My main goal is to have the ...
2
votes
0answers
172 views
Obfuscating location? [closed]
I have a webservice where I have one solution to obfuscate location called Points of interest which are predefined points scattered around an area.
When ever a user send their coordinates from their ...
3
votes
1answer
2k views
Arc collector: cannot enable offline mode for map
I am trying to setup arc collector for offline data collection in remote areas. I have followed steps from a few ESRI tutorials.
Problem: when I try to "enable offline mode" for the web map within ...
2
votes
0answers
189 views
Trimble Access vs. TerraFlex: Which is simpler for creating data entry forms? [closed]
I am working on an archaeological project and need to create forms for users in the field to use and take photos. I am renting a Trimble GNSS unit and can get Trimble Access for free with the unit, or ...
2
votes
1answer
95 views
collect location via form [duplicate]
I'm trying to find if there is some solutions for collect data from users via some easy form (not google forms, something more powerful)?
I heard about arcgis collector, but you have to log in (so ...
1
vote
0answers
90 views
How can I draw points on my mobile and then pass it to my computer? [closed]
we are doing a survey to know how many people still use outside bathrooms in the Caribbean, I want to go house by house using a shapefile image on mobile and point the location of points of interest ...
4
votes
1answer
1k views
Button to run Python Script on Custom Form Open QGIS
I'm very new to QGIS and Python (although years ago had some programming experience with C++), but have been muddling through with a fairly large project cataloging cemetery plots at the moment.
I ...
1
vote
0answers
76 views
Points to Path does not work [closed]
I have a data set from a collard animal separated by days, I want to create an individual line from each day of data to know how the animal has moved in the forest. When I use the plugin points2path ...
2
votes
2answers
402 views
Is there an easy way to read output from Open Data Kit in QGIS?
I use Open Data Kit (ODK) to do field collection of points of interest. ODK outputs each collected point as an XML-file with a structure like so:
<?xml version='1.0' ?>
<data id="...
0
votes
1answer
167 views
How to sequence points for GPS collection?
I have a large number of points representing assets that I need to field verify. Their unique IDs reflect when they were created, which is not a good indicator of how close they are to each other. ...
1
vote
0answers
128 views
How to get users click a map (OSM) and collect location data plus parameters?
I wonder if there is a simple service out there on the web that allows to collect location data from users easily. A click on a OSM map should give the location, then a form to collect a comment, ...
2
votes
1answer
70 views
Recast data from one geographic standard to another
I'm working right now a project looking at medical labour supply in rural areas in Australia. I aim to use STATA for most of this analysis, but a change in geographic standards by the Australian ...
2
votes
2answers
535 views
Trimble Pathfinder Differential Correction: ‘Uncorrected’ for block of GPS data
I’ve been collecting GPS point data without problems over the last few months. Recently, on two dates, after using Pathfinder differential correction, the exported records’ Corr_Type changed from ...
0
votes
1answer
156 views
Participative maps for collecting geographic information? [duplicate]
I'm looking for a simple way to collect information for a participative plans (regarding landscape) and show them on Google Maps.
I'm thinking to a small web form for asking information to public (es:...
1
vote
1answer
237 views
Protected general and admin settings in GeoODK app
I was wondering how to prevent the user to change the general and admin settings of the GeoODK (android-collect)? I mean to be protected with a password, for example.
I've tried to go to settings > ...
2
votes
1answer
1k views
Getting started with RTK base stations
My employers are looking into a partnership with a company that provides RTK base stations (they specialize in Topcon equipment) and are planning to replace our old total station with a Topcon HiPer ...
0
votes
2answers
84 views
Is it possible to append the same type of shapefile captured on two different Trimble Juno 3b's with ArcPad 10?
I will soon have access to two Trimble Juno 3b's which will both have ArcPad 10. I have done some practice with one Juno 3b and I am very confident with my ability to use them. All I need to know is ...
1
vote
0answers
144 views
Collecting and editing local data on a tablet?
I need to view, collect, and edit data that has to be stored locally on an iPad, though we may be able to get an Android tablet if that's the OS with a solution right now. This data cannot go through ...
2
votes
1answer
2k views
How to change ODK GPS accuracy threshold?
I am using ODK with ONA in XLSForm. As the GPS accuracy default is 5 meters, it automatically accepts it when it reaches 5 meter. Is it possible to change the default accuracy to less than 5 meters (i....
1
vote
1answer
108 views
Data Collection Solutions
I am seeking a new data collection software for a team of biologists who track migrating animals from planes through aerial telemetry. I currently use Delorme TOPO USA but when collecting point data ...
4
votes
1answer
456 views
Collecting polygon features from many people with simple online form? [closed]
I work at a transportation consulting firm that works over a large geographic area with dispersed offices. We'd like to develop a database of the locations of our projects, so that we can easily find ...
1
vote
0answers
3k views
ArcGIS Collector on Android failing to upload multiple features with attachments
I have a data capture map in ArcGIS Collector working correctly on a Samsung Galaxy Note 8 (Android 4.1.2) and a Samsung Galaxy Tab 4 (Android 4.4.2). I also have the same map working in the ArcGIS ...
3
votes
2answers
317 views
Collecting Thermal Map Data?
I am curious about making a thermal map to display where the hot spots and where the cool spots in a community are. Obviously the roads will be hot and the shaded areas with trees will be cool but ...
2
votes
1answer
211 views
What sub-meter geolocation solutions exist and how can I integrate them into a web and mobile mapping workflow?
I am the manager of seven water systems. What I am trying to do is map out every meter and valve on to a map and then my workers can have the maps on their iPhones so when they have to go fix a water ...
6
votes
5answers
1k views
Seeking Field Data Collection Tool? [closed]
I'm investigating the options available to my employer for the development of a Geological Field Data Collection tool. We would like to develop an Android app that can run disconnected from the ...
1
vote
2answers
5k views
Setting up account to start using Collector for ArcGIS?
I'm working on a presentation topic around mobile-based data collection solutions. I've used ODK and Fulcrum in production and absolutely love them. However, I'm going to be presenting to an Esri ...
3
votes
1answer
683 views
How to use Collect Values and Tabulate Areas in ModelBuilder?
I have problems with the Tabulate Area tool.
The polygons in my shapefile overlap and because of this ArcMap does not calculate proper values.
I try to solve this using ModelBuilder where it is ...
2
votes
3answers
1k views
How to use ArcGIS Online Web Maps/Apps to Collect Community Input securely?
I want to set up a computer at a public hearing that runs an ArcGIS Online Web Application from my subscription account where citizens can choose from predefined editable point layers I've already ...
2
votes
0answers
185 views
Developing Carto Mobile App
I have the project to develop a mobile application (Android) being able to get offline maps, go on the field, collect datas about the area we're at and then synchronize it with our data server when we'...
1
vote
0answers
78 views
Where to find Data with site that have hazardous, toxic or radioactive substances?
Does anybody know where to find data that lists the location of sites that have hazardous, toxic or radioactive substances?
I'm working on a HUD project and need to be able to find out if sites for ...
4
votes
2answers
100 views
Where can I find spatial data on polar fish populations?
Where can I find spatial data on polar fish populations? I am looking specifically for polar cod, but any fish will do at this point in my project. I also need arctic ocean salinity, temperature, and ...
3
votes
2answers
5k views
How to easily enter a point feature in ArcGIS? (arcmap10)
My job requires me to enter point features into ArcGIS 10 which correlate to underground RFID markers that mark underground telecom infrastructure. Right now, the workflow requires someone to go out, ...
15
votes
7answers
4k views
What iOS (iPhone/iPad) app from the App Store can I use to collect data?
What iOS app from the iTunes App Store can I use to collect data (mainly points, perhaps photos) and later import them into my GIS?
I am mainly interested in an out-of-the-box solution, not develop ...
